| 摘要 | 第1-4页 |
| Abstract | 第4-8页 |
| CHAPTER 1 INTRODUCTION | 第8-12页 |
| ·Motivation for the present research | 第8-9页 |
| ·Significance of the present study | 第9-10页 |
| ·Research questions of the thesis | 第10页 |
| ·Outline of the thesis | 第10-12页 |
| CHAPTER 2 LITERATURE REVIEW | 第12-22页 |
| ·A brief review of the studies of hedges | 第12-14页 |
| ·The studies of hedges abroad | 第12-13页 |
| ·The study of hedges at home | 第13-14页 |
| ·A brief review of the studies of hedges in research articles | 第14-17页 |
| ·Studies of hedges in research articles abroad | 第14-16页 |
| ·Studies of hedges in research articles in China | 第16-17页 |
| ·Theoretical Framework | 第17-22页 |
| ·Working definition of hedges in this study | 第18-19页 |
| ·Categorization of hedges in this study | 第19-20页 |
| ·Functions of hedges in this study | 第20-22页 |
| CHAPTER 3 CORPUS AND METHODOLOGY | 第22-25页 |
| ·Corpus establishment | 第22-23页 |
| ·Methodology | 第23-25页 |
| CHAPTER 4 RESULTS AND DISCUSSION | 第25-45页 |
| ·Comparison of types of hedges in Chinese and English scientific and technological research articles | 第25-36页 |
| ·Comparison of C&E1 | 第29-34页 |
| ·Comparison of C&E2 | 第34页 |
| ·Comparison of C&E3 | 第34-36页 |
| ·Comparison of C&E4 | 第36页 |
| ·Study of occurrence frequency of hedges in Chinese and English scientific and technological research articles | 第36-42页 |
| ·Comparison of Occurrence Frequency of C&E1 Hedges | 第37-38页 |
| ·Comparison of Occurrence Frequency of C&E2 Hedges | 第38-39页 |
| ·Comparison of Occurrence Frequency of C&E3 Hedges | 第39-41页 |
| ·Comparison of Occurrence Frequency of C&E4 Hedges | 第41-42页 |
| ·Summary on types and occurrence frequency of hedges | 第42-45页 |
| CHAPTER 5 FUNCTIONS OF HEDGES | 第45-55页 |
| ·Verschueren's Adaptation Theory | 第45-46页 |
| ·Hedges as Adaptation to Contextual Correlation | 第46-49页 |
| ·Adaptation to communicative functions | 第49-54页 |
| ·Adaptation to protection for authors | 第49-51页 |
| ·Adaptation to Politeness to readers | 第51-53页 |
| ·Adaptation to Writer-Reader Relationships | 第53-54页 |
| ·Summary | 第54-55页 |
| CHAPTER 6 CONCLUSION | 第55-59页 |
| ·Summary of major findings | 第55-56页 |
| ·Implication | 第56-57页 |
| ·Limitations and suggestions | 第57-59页 |
| ACKNOWLEDGEMENTS | 第59-60页 |
| REFERENCES | 第60-64页 |
| APPENDICES | 第64-70页 |
| PUBLICATIONS | 第70-71页 |
