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¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ1

¡¡¡¡First of all, I¡¯d like to express my deepest gratitude to my supervisor, Professor X XX, who has done a great favor to my thesis. From the planning of the questionnaire to the revision of the thesis, I have benefited greatly from his patience, encouragement and excellent guidance. What¡¯s more, I am deeply moved by his serious attitude towards academic work.

¡¡¡¡Secondly, I would like to give my thanks to the hundreds of students and teachers in Guilin Experiential Middle School Attached to the Capital Normal University and Guilin No.1 Middle School, who have provided the statistics of the investigation for my thesis, especially Mr. X XX, the vice headmaster of the Attached Middle School and Ms. X XX, who supported me a lot in my investigation.

¡¡¡¡Finally, my thanks go to Ms X XX and Ms XX for their valuable suggestions.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ2

¡¡¡¡I would like to express my gratitude to all those who helped me during the writing of this thesis.

¡¡¡¡My deepest gratitude goes first and foremost to Professor Zhou Yanxia, my supervisor, for his constant encouragement and guidance. He has walked me through all the stages of the writing of this thesis. Without his consistent and illuminating instruction, this thesis could not have reached its present form.

¡¡¡¡Second, I would like to express my heartfelt gratitude to Professor Wang Jinsheng, who led me into the world of translation. I am also greatly indebted to the professors and teachers at the Department of English: Ms. Wu Qing, Feng Shaozhong and Han Xiaoya, who have instructed and helped me a lot in the past two years.

¡¡¡¡Last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. I also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ3

¡¡¡¡First and foremost, I would like to express my heartfelt gratitude to mysupervisor, Professor Jia Aiwu. I have benefited tremendously from her criticalthinking and insightful viewpoint. Through his patient instruction,I finally focusedon the object studied in this thesis, and obtained valuable advice on aspects rangingfrom frame work constructing and data collection to elaborated analysis.

¡¡¡¡Secondly, Im profusely grateful to my respected predecessors and teachers.

¡¡¡¡Without their precious suggestions, I could not have come this far in this thesis.

¡¡¡¡Moreover, I owe my thanks to my family and friends, who have always supportedme with their generous encouragements and praises.

¡¡¡¡Last but not least, I sincerely thank my fellow classmates. We share joys andanxieties, which propels us forward together throughout the arduous journey.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ4

¡¡¡¡The accomplishment of this thesis has covered half a year,s experiment and another halfa years analysis. It can not be denied that whole process is quite tough. Despite all theproblems during research and limitations, the thesis finally comes into being. However, thiscan not be achieved without the help of many people.

¡¡¡¡First and foremost, I would like to give my sincere gratitude to my distinguished andrespectable supervisor, Prof. Qi Yuanfang, for his all-along supports during not only theresearch process, but the whole post-graduate year. He is the one who gives me inspiration ofthe thesis topic, enlightens me empirical method helps me conduct teaching experiment, andinstructs me analyzing approaches. I have to say that this thesis is born from his insightfulinstructions and warm encouragement.

¡¡¡¡Secondly, I also own my appreciation to Prof, Gongrong who gives me a lot ofinspiration, insightful advice and instructions.

¡¡¡¡And also, this thesis can not be accomplished without teachers of Foreign LanguagesSchool who impart knowledge to me and classmates who offer me help.

¡¡¡¡Last but not least, I would like to extend my thanks to the students participating in thisresearch for their patient corporation.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ5

¡¡¡¡I would like to dedicate my paper to all those who have offered me tremendousassistance during the three years in Zhejiang University of Finance and Economics.

¡¡¡¡First of all, my heartiest thanks flow to my supervisor, Professor Cao Daogen, forhis helpful guidance, valuable suggestions and constant encouragement both in mystudy and in my life. His profound insight and accurateness about my paper taught meso much that they are engraved on my heart. He provided me with beneficial help andoffered me precious comments during the whole process of my writing, without whichthe paper would not be what it is now.

¡¡¡¡Also, I would like to express my sincere gratitude to all the professors who havetaught me in this university that greatly broadened my horizon and enriched myknowledge in my study. Their inspirational and conscientious teaching have providedme with a firm basis for the composing of this paper and will always be of great valueto my future academic research.

¡¡¡¡My thanks also go to the scholars whose monographs and academic papers haveenlightened me in the writing of this paper.

¡¡¡¡Finally, I would like to extend my deep gratefulness to my family and friends,especially my three roommates, Chen Linghua, Gong Sha and Huang Jin, whoseencouragement and support have made my accomplishments possible.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ6

¡¡¡¡First of all, I would like to extend my sincere gratitude to my supervisor, Zhang Hong, for her instructive advice and useful suggestions on my thesis. I am deeply grateful of her help in the pletion of this thesis.

¡¡¡¡High tribute shall be paid to Ms. Geng Li, whose profound knowledge of English triggers my love for this beautiful language and whose earnest attitude tells me how to learn English.

¡¡¡¡I am also deeply indebted to all the other tutors and teachers in Translation Studies for their direct and indirect help to me.

¡¡¡¡Special thanks should go to my friends who have put considerable time and effort into their ments on the draft.

¡¡¡¡Finally, I am indebted to my parents for their continuous support and encouragement.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ7

¡¡¡¡I would like to express my gratitude to those who help accomplish this study.

¡¡¡¡First of all, I thank sincerely my supervisor, Dr. Rita Welsh who always responded my email rapidly and in time with a lot of useful suggestions and comments and encouraged me to complete the study. And I also appreciated the guidance and help from Jane Williams, my previous supervisor.

¡¡¡¡Secondly, Thanks to my teachers and classmates in HTMI, David Coy, Carlos Oberli, Dorothy Qin, Grigory and Louise Liu, who gave initiative advises http://www.51lunwen.org/sslwzx/ and their insight which helped me understand better the topic. Moreover, I would like to give my deeper thanks to my friends, Sophy Wang, Lu Wang, Cissy Niu and James Li, who looked for and made an appointment with top leaders of hotels participating in this study and my special thank is also given to those participants who provided valuable insights and made an important contribution for fulfilling this research.

¡¡¡¡Finally, I thank all of my family members, especially, my parents and sister for their financial support and encouragement.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ8

¡¡¡¡The writing of a PhD dissertation is not an easy task, especially for someone whohas just begun her academic journey. During the evolution of this dissertation. I amdeeply indebted to a number of people who have guided and supported me in manyways.

¡¡¡¡I would like to express my utmost gratitude to my research supervisor. ProfessorShen Li for her sincere and selfless support, prompt and useful advice during myresearch. She gives me a lifetime unforgettable memory of her benevolence, patience,intelligence,diligence and erudition.

¡¡¡¡My gratitude also goes to Professor Chu Xiaoquan, Qu Weiguo and Shen Yuan ofthe Department of English, College of Foreign Languages and Literature, FudanUniversity. They gave me substantial suggestions for the refinement of thisdissertation during my pre-oral defense.

¡¡¡¡I would also like to thank Professor Zhang Chunbai of the College of ForeignLanguages, East China Normal University. Professor Huang Guowen of the Collegeof Foreign Languages, Zhongshan University and Professor Wang Tongshun of theCollege of Foreign Languages, Shanghai Jiaotong University, for careful review ofmy dissertation and their valuable comments.

¡¡¡¡I would like to extend my special thanks to Professor Wu Zhongwei ofInternational Cultural Exchange School. Fudan University. Being my supervisorduring the MA studies, he awakened my interest in SLA and TCSOL in particular. Thesame gratitude also goes to Professor Chen Liangmin of the Department of French,College of Foreign Languages and Literature, Fudan University. He introduced me theelegance of the French language which I chose as my major for bachelor's study and Iwould never forget what I have learnt from him.

¡¡¡¡My special thanks also go to my mentor Professor Shen Xiaoxiao ofInternational Cultural Exchange School. Fudan University. He provided metremendous guidance and support for my administrative work as master students'

¡¡¡¡counselor and built a perfect model of a teacher, an advisor and a leader.

¡¡¡¡I am also grateful to Mme Zhang Shiyu' Li Lin. Shen Anyi and He Shijin fortheir spiritual support during my project. I am always indebted to the encouragementsthey gave me.

¡¡¡¡Lastly and most importantly. I would like to acknowledge the endless support,encouragement patience and understanding of my family. They gave me the incentiveto do this work and have put up unquestioningly with the difficult person that I hadbecome in the last few critical months of finalizing this dissertation. I love themforever.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ9

¡¡¡¡I would like express my gratitude to all those who offer great help for my thesis.

¡¡¡¡First and foremost, my deepest gratitude goes to my supervisor Professor YuMuhong, for his father-like encouragement and guidance. He provided me withabundant suggestions and priceless criticisms for my writing of the thesis. But for hisconstant patient guidance and enlightenment, the thesis would have become a missionimpossible.

¡¡¡¡My sincere thanks also go to the teachers from the School of Foreign Languages ofZhejiang University of Finance and Economics, who jointly led me into the holy templeof academic field. Here, I want to send my gratefulness to those respected teachers likeProf. Wang Baorong, Prof. Li Changbao, Prof. Chen Xianghong, Prof. Shao Youxue,Prof. Teng Chao, Prof. Cen Qunxia etc. Thank you for your being with me and beingthe witnesses for the birth, growth and perfection of my thesis.

¡¡¡¡I feel indebted to my parents, without their mental and material support, I couldbarely finish the thesis on time.

¡¡¡¡Finally, my thanks should be sent to all my classmates, for their endless supportand warm hearts, making me feel like living in a united big family.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ10

¡¡¡¡This thesis would never have materialized without the help and support frommany parties.

¡¡¡¡First, I'd like to express my sincere gratitude to my supervisor in China ForeignAffairs University, Professor Zhang Xiaoli, who gave me a lot of useful andconstructive advice on my thesis. With his professional and academic knowledge, hetaught me how to do research, how to revise the thesis. Whenever I sent him ane-mail concerning my thesis, he replied soon. He spent a lot of time reading andcorrecting my thesis. Only under his guidance and encouragement could I finish thisthesis.

¡¡¡¡I am also indebted to all my teachers in the English Department of ChinaForeign Affairs University. As a teacher myself, I learned a lot about interpretation,translation, culture and teaching methods from them, which is helpful to my job.

¡¡¡¡I wish to express my thanks to my leader, dean of the Department of AppliedLinguistics, Capital Medical University. She encouraged me constantly to finish thestudy.

¡¡¡¡At last, I want to thank my husband and other family members and relatives,who showed their concern and support when I pursued my study.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ11

¡¡¡¡My study at the College of International Studies will soon come to an end and, at the completion of my graduation thesis; I wish to express my sincere appreciation to all those who have offered me invaluable help during the four years of my undergraduate study here atTai Zhou Institute of Nanjing university of Science and Technology.

¡¡¡¡Firstly, I would like to express my heartfelt gratitude to my supervisor, Professor Xu Guixiang, for her constant encouragement and guidance. She has walked me through all the stages of the writing of this thesis. Without her consistent and illuminating instruction, this thesis could not have reached its present form.

¡¡¡¡Secondly, I should give my hearty thanks to all the other faculty members of the Department of English for their patient instructions in various courses and their precious suggestions for my study here.

¡¡¡¡Lastly, my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. I also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ12

¡¡¡¡I would like to express my gratitude to all those who helped me during the writing of this thesis. I gratefully acknowledge the help of my supervisor, Ms. Sun Yanlan, who has offered me valuable suggestions in the academic studies. In the preparation of the thesis£¬ she has spent much time reading through each draft and provided me with inspiring advice. Without her patient instruction, insightful criticism and expert guidance, the pletion of this thesis would not have been possible.

¡¡¡¡I also owe a special debt of gratitude to all the professors in Foreign Languages Institute, from whose devoted teaching and enlightening lectures I have benefited a lot and academically prepared for the thesis.

¡¡¡¡I should finally like to express my gratitude to my beloved parents who have always been.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ13

¡¡¡¡The present work is the result of all joint efforts. So many people hada part in the making of this dissertation that it is hard to acknowledgethem all.

¡¡¡¡First of all, I would like to express my deep gratitude to Professor BaiJiehong, supervisor of my dissertation, for having continually stimulatedme with her methodological concerns and persistent guidan‰ò in bothrealms of studies and life during the lengthy period of my writing thework, for having helped me with so many practical problems, andparticularly for having stirred my interest in cognitive linguistics when Ibegan my work on graduate program under her supervision. wish tothank her sincerely for her tolerance and openness which nurtured myinterest in the present work. Now I consider it a great privilege to havegot the benefit of her professional guidance.

¡¡¡¡I would like to thank the College of Foreign Studies, Hunan NormalUniversity, for providing a stimulating academic environment and varioussupport which promote my growth here. Thanks to the professors at theEnglish Department for their share in shaping my view of the relationshipbetween language and cognition. I particularly appreciate my interactionwith Professor Huang Zhengding for his philosophical ideas,ProfessorLiao Guangrong for his open-mindedness and encouragement to my ideas,Professor Deng Yunhua for her inspiring comments to my questions, andProfessor Qin Yuxiang, for his nice grammar book which fanned myinterest in Cognitive Grammar and his discerning comments on my work.

¡¡¡¡Special thanks to Professor Jiang Hongxin, who broadened my visionthrough his course on classics. His eloquent talks made me feel as if Iwere a literary student, and I was inspired to read so much beyondlinguistics.

¡¡¡¡I am deeply grateful to the College of Foreign Studies as a whole foroffering me a warm home for my explorations. Without her support, Iwouldn't have got the opportunity to pursue my study at the ForeignLanguage Education and Research Center, Beijing Foreign StudiesUniversity; nor could I have won the scholarship from China ScholarshipCouncil, which enabled me to study at University of Oregon. My year ofapprenticeship at Beijing Foreign Studies University had a considerableinfluence on my view of language and language studies. Special thanks toProfessor Chen Guohua, who as the supervisor of my visiting programallowed me a chance to go into the world of Case Grammar, an inspiringworld I still love to stay and explore. Warm thanks also to ProfessorWang Kefei, who spared his time to discuss my topic and gave me hisprofessional advice during my stay at Beijing.

¡¡¡¡I am greatly indebted to Professor Mark Johnson, who invited me toUniversity of Oregon for further studies. It was so nice an experienceattending his lectures. And it was he who first introduced me toneuroscience, and its relation to cognitive linguistics. His coherence inmultiple disciplines makes him a role model for researchers.

¡¡¡¡I want to say thank you to my best friends Zeng Yonghong, ChenMinzhe and Yang Quan for their persistent encouragement. Ours is aneverlasting world of friendship and brotherhood without which life wouldbe boring and monotonous, and also a lively forum for communicationsof questions and views, which, I believe, will always breed sm^pt answers.

¡¡¡¡Special thanks go to Professor Liu Zhengguang, Professer LiangXiaobo, and also Chen Yunjiang, who always give me insightfulcomments on my work, whether on public occasions or in private talks.

¡¡¡¡Great is my debt to my family. Warm thanks to my parents andparents-in-law for their consistent support and concern, and all kinds ofpractical help. Their generous help has accompanied me for so long, yet Ican only offer so little in return. To my wife I am most indebted for herlove and understanding, and her capability to manage all the matterswhen I feel helpless. She has the ability to put things in the right track.

¡¡¡¡Without her support, this work would simply not have been possible. I ammuch indebted to my son Max, who keeps asking me how soon I wouldcomplete the work, so that I could come back to a normal life full oflaughter, games and outdoor activities. His concern brings me warmencouragement and sweet joys when I feel frustrated at myself for mypoor performance in organizing both my life and study. Finally, I'd like tothank my brothers, whose frequent visits and calls remind me where Ibelong when I feel lonely.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ14

¡¡¡¡At the very first, I am honored to express my deepest gratitude to my dedicated supervisor, Miss Wang Chao, with whose able guidance I could have worked out this thesis. She has offered me valuable ideas, suggestions and criticisms with her profound knowledge and rich research experience. Her patience and kindness are greatly appreciated. Besides, she always puts high priority on our dissertation writing and is willing to discuss with me anytime available. I have learnt from her a lot not only about dissertation writing, but also the professional ethics. I am very much obliged to her efforts of helping me complete the dissertation. I am also extremely grateful to Prof. Wei Xiaohong whose patient and meticulous guidance and invaluable suggestions are indispensable to the completion of this thesis.

¡¡¡¡Thanks are also due to my roommates, who never failed to give me great encouragement and suggestions. Special thanks should go to Miss Dong, Miss Ma, and Miss Wei for their brainstorming with me when I failed in coming up with ideas.

¡¡¡¡At last but not least, I would like to thank my family for their support all the way from the very beginning of my study. I am thankful to all my family members for their thoughtfulness and encouragement.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ15

¡¡¡¡Upon finishing this thesis, I would like to express my great gratitude towards allthose who have offered me sincere assistance in the three years.

¡¡¡¡First and foremost, my hearty thanks go to my supervisor, Professor ZhangRuwen, who has given me insightful suggestions and constant encouragement both inmy study and in my life. Furthermore, Professor Zhang's painstaking teaching andvaluable advice have profoundly contributed to the completion of the present thesis.

¡¡¡¡Also, I own my thanks to all the professors who have taught and enlightening meduring my studies in the campus, for guiding me in the field of research work, whichis both challenging and fantastic. The experience and profit I obtained will be ofgrand importance to my further studies.

¡¡¡¡Finally, I am also grateful to my family and friends, who encourage and supportme and share with me my worries, frustrations, and happiness.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ16

¡¡¡¡This thesis would not have been possible without the guidance and help fromseveral individuals who contributed and extended their valuable assistance in thepreparation and completion of my study.

¡¡¡¡First and foremost, my utmost gratitude to my supervisor at China Foreign AffairsUniversity, Dr. Lu Xiaohong, for her guidance, understanding, patience, and most ofall, her support during my writing of the thesis paper. She has spent so much of hertime giving me direction and reading, correcting my thesis paper. Without her advices,I would have been lost in a wrong field.

¡¡¡¡I would also like to thank all of my teachers in the English Department of ChinaForeign Affairs University, especially to Professor Shi Yi, Professor Sun Jisheng,Professor Song Aiqun, Professor He Qun and Professor Cui Changqing. I have learneda lot from them during my time at this university, and I will always miss the time Ihave spent together with them in the classroom.

¡¡¡¡I would like to express my thanks to all faculty members who have provided usnumerous support and help.

¡¡¡¡Finally, and most importantly, I would like to thank my parents. Their support,encouragement, quiet patience and unwavering love are the driving power of my work.

¡¡¡¡I thank my son, Gao Zizheng, who always cheers me up and brings inspirations to me.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ17

¡¡¡¡Acknowledgements

¡¡¡¡Grateful acknowledgement is made to my supervisor Mr. Chen Fang who gave me considerable help by means of suggestion, comments and criticism. His encouragement and unwavering support has sustained me through frustration and depression. Without his pushing me ahead, the completion of this thesis would be impossible. In addition, I deeply appreciate the contribution to this thesis made in various ways by my friends and classmates.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ18

¡¡¡¡Upon the completion of the thesis, I would like to take this opportunity toexpress my sincere gratitude to my supervisor, Professor Peng Xiaohua, who hasgiven me important guidance on the thesis. Without his help and encouragement,my thesis would have been impossible. Besides his help with my thesis,he hasalso given me much advice on the methods of doing research, which is of greatvalue to my future academic life.

¡¡¡¡I am also obliged to other teachers whose lectures have broadened my scopeof vision in British and American literature and help me lay a necessaryfoundation for the writing of the thesis. I am also grateful to all the members ofthe faculty and staff in the College of Foreign Languages who have provided mewith a lot of help and guidance.

¡¡¡¡Last but not least, I would like to express my gratitude to all the friends andfamily members who have offered me help. Without their help,I could not havefinished my study and this thesis.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ19

¡¡¡¡I would like to take this opportunity to express my deep gratitude to my supervisor,professor Lu yun, who has offered me constructive guidance for the planning of the thesisand invaluable advice and encouragement for its completion and improvement. She is sucha devoted teacher that though busy in her teaching and research, she never hesitates to offerme timely and spiritual support. She spares no effort to read, comment on and polish mythesis.

¡¡¡¡Besides, I wish to extend my sincere gratitude to all the teachers in the School ofForeign Languages in Guangxi Teachers Education who have taught me and given meunselfish support during my three postgraduate years. It is my great honor to have knownall those respectable teachers.

¡¡¡¡Furthermore, I would like to thank my classmates, Mao xiang, Zhu Jingyan, Zou qin,etc. They have helped me and encouraged me a lot in my writing. Without them, mypostgraduate life will lose much happiness.

¡¡¡¡Finally, I feel indebted to my parents, for their understanding and love in life. I lovethem.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ20

¡¡¡¡I would like to take this opportunity to thank a number of people who haveoffered invaluable assistance in the preparation of the dissertation.

¡¡¡¡My deepest gratitude goes first and foremost to Professor Luo Ping, mysupervisor, who has walked me through all the stages of the writing of this thesis. Hiscritical comments, constant encouragement and guidance have greatly enlightened menot only on the academic pursuit but also on the morals of being a man. Without hisconsistent and illuminating instruction, this thesis could not have reached its presentstage.

¡¡¡¡Secondly, I would like to express my heartfelt thanks to all the professors andteachers whose insightful lectures have well prepared me for the completion of thethesis during my pursuit of the Master Degree ofArts at SISU.

¡¡¡¡I also greatly appreciate the assistance offered by the authors and scholarsmentioned in the bibliography, without whose works, the literature review of mythesis would not have been possible.

¡¡¡¡Last, I am deeply indebted to my beloved parents and friends, who alwayssupported me, willingly discussed with me, and offered valuable insights. Their helpand support have accompanied me through the difficult course of the thesis andmoments of my life.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ21

¡¡¡¡my deepest gratitude goes first and foremost to professor ¡Á¡Á¡Á, my supervisor, for her constant encouragement and guidance. she has walked me through all the stages of the writing of this thesis. without her consistent and illuminating instruction, this thesis could not have reached its present form. second, i would like to express my heartfelt gratitude to professor ¡Á¡Á¡Á, who led me into the world of translation. i am also greatly indebted to the professors and teachers at the department of english: professor ¡Á¡Á¡Á, professor ¡Á¡Á¡Á, who have instructed and helped me a lot in the past two years. last my thanks would go to my beloved family for their loving considerations and great confidence in me all through these years. i also owe my sincere gratitude to my friends and my fellow classmates who gave me their help and time in listening to me and helping me work out my problems during the difficult course of the thesis.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ22

¡¡¡¡In the paper completed, I feel excited. From the topics of the paper, the collection of data to the writing and layout of the paper, I got a lot of enthusiastic help.

¡¡¡¡First of all, I would like to thank Mr. Zhang Yuqing, who led me to the door of information security, and put forward a lot of valuable comments on my research, so that my research work has a goal and direction. In the past two years, he was careful guidance and education to me. It enables me to study and improve continuously, and the research results of these topics have also become the main material of this paper. At the same time, Zhang profound knowledge, rigorous scholarship attitude also makes me very admire, is my model of learning and work. Thank the teacher for my care and attention, in this to express our sincere gratitude.

¡¡¡¡Thanks to my parents and girlfriend bear, giving unlimited love in life, especially the cubs, and when she did not cherish the love, her love, lost her life and perhaps even too late to regret, for there is no chance, when approaching graduation, deeply regret to say to you: "you love let me grow up and know how to love, and I let you scarred, and you have to flee, if there is any chance, if there is the afterlife, I will put you in the palm of care".

¡¡¡¡Thank you for working life in the prevention center colleagues, Dr. Zhang Dehua, Dr. Liu Xiangning, Dr. Mao Jian, Zhao Honghao, Jia Suping, Li Haibao, Sun Pengpeng, Yang Xiaoyan, Huang Dandan, Wang Ruoxin, Yang Ni, Yu Junsong, because you have a wonderful and fulfilling life.

¡¡¡¡Thank you in the study of information security professional students spend time together students, Jiang Bailiang, Shi Miaolei, Zhang Jun, Cheng Liang, Jing Wong, Wu Jingjing, Hu Hao, Jia Wei, Liu Ziwen, Liu Jingxuan, Deng Yi, Wang Xianggen, Wei Yong, Ren Rong, and spend the internship at the state Key Laboratory of information security years.

¡¡¡¡®…˜I(y¨¨)Õ“ÎÄÓ¢ÎÄÖÂÖxÔ~ ƪ23

¡¡¡¡It is a significant and unforgettable experience for me to spend such a long time onwriting, modifying and polishing this thesis. Many kind-hearted people give me a greatamount of help, professional advice and encouragement. Thus, here I would like toexpress my sincere gratitude to them.

¡¡¡¡First of all, I will show my sincere thanks to my supervisor Professor Jia Aiwuwho has given me invaluable guidance and constant support and encouragementthroughout the whole processes. During my study of English education in this two ahalf years and the witting of this thesis, she has always been generous to offer me usefulsuggestions, answer my question and discuss research questions with me. Her detailguidance and helpful comments on my thesis encourage me to overcome difficultiesand think more critically during the processes of writing.

¡¡¡¡Secondly, I will also express my sincere gratitude to other professor and teacherswho had give me constructive suggestion to my thesis and thanks to them forinstructing me to construct my knowledge in English teaching in the past two and a halfyears.

¡¡¡¡Thirdly, I want to thank all my affectionate classmates and friends. During the twoa half years' study and the writing of this thesis, they have given me a lot of support andencouragement in their own ways.

¡¡¡¡At last, I will give the deepest gratitude to my family for their regretless supportand love to me.

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