| ABSTRACT | 第1-3页 |
| 摘要 | 第3-6页 |
| List of Figures | 第6-7页 |
| Chapter One Introduction | 第7-11页 |
| ·Research Background | 第7-9页 |
| ·Research Objective | 第9页 |
| ·Organization of the Thesis | 第9-11页 |
| Chapter Two Literature Review | 第11-21页 |
| ·Definition of Hedges | 第11-12页 |
| ·Classification of Hedges | 第12-13页 |
| ·Previous Studies on Hedges Abroad | 第13-17页 |
| ·Previous Studies on Hedges at Home | 第17-21页 |
| Chapter Three Theoretical Framework | 第21-31页 |
| ·A Brief Introduction to Relevance Theory | 第21-23页 |
| ·Contextual Effects and Processing Efforts | 第22-23页 |
| ·Maximal Relevance and Optimal Relevance | 第23页 |
| ·A Brief Introduction to the Adaptation Theory | 第23-27页 |
| ·Making choices | 第23-25页 |
| ·Three Properties of Language | 第25-26页 |
| ·Four Angles of Investigation | 第26-27页 |
| ·Merits and Demerits | 第27-28页 |
| ·The Relevance-Adaptation Model | 第28-31页 |
| Chapter Four Study from a Perspective of Relevance-Adaptation Model | 第31-50页 |
| ·An Introduction to Political Speech | 第31-33页 |
| ·Definiton of Political Speech | 第31-32页 |
| ·Discourse Features of Political Speech | 第32-33页 |
| ·Hedges as a Process of Relevance | 第33-34页 |
| ·Hedges as a Process of Choice-making | 第34-36页 |
| ·Hedges as a Process of Choice-making Based on Relevance | 第36-38页 |
| ·Hedges as an Integrated Process between Linguistic Forms and ContextualCorrelates | 第38-44页 |
| ·Adaptation to Social World | 第38-41页 |
| ·Adaptation to Mental World | 第41-43页 |
| ·Adaptation to Physical World | 第43-44页 |
| ·Hedges in political speech as a process of strategies-choosing | 第44-50页 |
| ·Credibility Strategy | 第44-46页 |
| ·Self-Protection | 第46-47页 |
| ·Politeness | 第47-48页 |
| ·Harmony | 第48-50页 |
| Chapter Five Conclusion | 第50-54页 |
| ·Major Findings and Significance | 第50-51页 |
| ·Limitations | 第51-52页 |
| ·Suggestions for Future Study | 第52-54页 |
| References | 第54-57页 |
| Acknowledgements | 第57-59页 |
