Finally,my sincere gratitude goes to my family and friends for their unweaving supportand understanding which encourages me to overcome academic struggle and support me tospend three years' life here. With the help of such selfless individuals, I am glad to dedicatemy heartfelt thanks to all of you.

英文论文致谢五:

　　Before concluding this thesis,I would like to take the precious opportunity to extend mywholehearted gratitude to all that have helped me with my accomplishment of this paper.

　　First and foremost, I owe my deepest gratitude to my distinguished and cordialsupervisor, Ms. Chen Li, who has supported me from the material and psychological aspect,guided me in collection of abundant materials, and enlightened me while in confusion.

　　Without her dedicated assistance and insightful supervision, this paper would have gonenowhere.

　　Secondly, I would express my heartfelt thanks to my family for their unconditional loveand care all the time without whose support I would be easily beaten down by the difficultiesencountered in the writing process.

　　Last but not least,my sincere appreciation also goes to my prestigious and edifyingprofessors in our English department including Prof. Yan Jinglan, Prof. Wang Zhiqin, Prof.

　　Shao Zhihong and Prof. Wang Jianguo, who have inspired me and push me forward to theacademic world, and to Ms. Ren Zhiyi the librarian of ECUST,who has provided me withtimely material support.