| Abstract | 第1-10页 |
| 摘要 | 第10-11页 |
| List of Figures | 第11-12页 |
| List of Tables | 第12-13页 |
| List of Abbreviations | 第13-14页 |
| Introduction | 第14-17页 |
| Chapter One Literature Review | 第17-37页 |
| ·An Overview of Previous Studies on Hedging Abroad | 第17-22页 |
| ·Studies on Hedging from the Perspective of Logic | 第17-18页 |
| ·Studies on Hedging from the Perspective of Semantics | 第18-19页 |
| ·Studies on Hedging from the Perspective of Psychology | 第19-20页 |
| ·Studies on Hedging from the Perspective of Pragmatics | 第20-22页 |
| ·An Overview of Previous Studies on Hedging in China | 第22-23页 |
| ·Wu Tieping's Studies on Hedging | 第22-23页 |
| ·Post-Wu Tieping's Studies on Hedging | 第23页 |
| ·Theoretical Background | 第23-36页 |
| ·Definitions of Hedging | 第24-25页 |
| ·Categorizations of Hedging | 第25-30页 |
| ·Semantic Categorizations | 第26-27页 |
| ·Grammatical categorizations | 第27-28页 |
| ·Pragmatic Categorizations | 第28-30页 |
| ·Hedging in Scientific Research Articles | 第30-36页 |
| ·Studies on Hedging in Scientific Research Articles Abroad | 第30-33页 |
| ·Studies on Hedging in Scientific Research Articles in China | 第33-35页 |
| ·A Brief Introduction to Conclusion in Scientific Writing | 第35-36页 |
| ·Insights for Present Study | 第36-37页 |
| Chapter Two Theoretical Framework and Methodology | 第37-44页 |
| ·Theoretical Framework | 第37-40页 |
| ·Working Definition of Hedging in the Present Study | 第37页 |
| ·Classifications of Hedging Adopted in the Present Study | 第37-40页 |
| ·Methodology | 第40-44页 |
| ·Research Questions | 第40-41页 |
| ·Data Collection | 第41-42页 |
| ·Data Analysis Procedures | 第42-44页 |
| Chapter Three Results and Discussion | 第44-81页 |
| ·Frequency and Interpretations of Hedging in Both Corpora | 第44-73页 |
| ·Lexical Hedges | 第44-73页 |
| ·Epistemic Verbs | 第46-53页 |
| ·Modal Auxiliary Verbs | 第53-65页 |
| ·Epistemic Adverbs | 第65-68页 |
| ·Epistemic Adjectives | 第68-72页 |
| ·Epistemic Nouns | 第72-73页 |
| ·Non-lexical hedges | 第73-76页 |
| ·Reference to limiting experimental conditions | 第74-75页 |
| ·Reference to a model, theory or methodology | 第75页 |
| ·Admission to a lack of knowledge | 第75-76页 |
| ·Comparison between the Two Corpora | 第76-78页 |
| ·Similarities concerning Hedging Use between the Two Corpora | 第76-77页 |
| ·Differences concerning Hedging Use between the Two Corpora | 第77-78页 |
| ·Possible Interpretations for the Differences between Two Corpora | 第78-79页 |
| ·Functions of Hedges in Scientific Conclusion Writing | 第79-81页 |
| Chapter Four Conclusion | 第81-85页 |
| ·Major Findings | 第81-82页 |
| ·Some Implications and Limitations | 第82-84页 |
| ·Suggestions for Future Study | 第84-85页 |
| Appendix A | 第85-89页 |
| Appendix B | 第89-94页 |
| Bibliography | 第94-101页 |
| Acknowledgements | 第101-102页 |
| 学位论文评阅及答辩情况表 | 第102页 |
