| 摘要 | 第1-5页 |
| Abstract | 第5-8页 |
| Chapter One Introduction | 第8-12页 |
| ·Rationale for the present study | 第8-10页 |
| ·Aims of the present study | 第10页 |
| ·Specific questions to be addressed | 第10-12页 |
| Chapter Two Literature Review | 第12-31页 |
| ·The concept of hedging & hedge | 第12-15页 |
| ·Classifications of hedges | 第15-19页 |
| ·Classifications of hedges by Prince et al | 第16-17页 |
| ·Classifications of hedges by Hyland | 第17-19页 |
| ·Semantics of hedges | 第19-24页 |
| ·Hedges as devices to increase fuzziness | 第20-22页 |
| ·Hedges as devices to decrease fuzziness | 第22-24页 |
| ·Pragmatics of hedges | 第24-29页 |
| ·Textual functions of hedges | 第24-26页 |
| ·Interpersonal functions of hedges | 第26-29页 |
| ·A brief summary of this chapter | 第29-31页 |
| Chapter Three Methodology | 第31-33页 |
| ·Description of the data | 第31-32页 |
| ·Methods of data analysis | 第32-33页 |
| Chapter Four Hedging in RAs of the Two Disciplines | 第33-70页 |
| ·Overall incidence of the hedging devices in the corpora | 第33-35页 |
| ·Specific categories of hedging devices in the study | 第35-67页 |
| ·Modal verbs | 第35-46页 |
| ·Full verbs | 第46-51页 |
| ·Adverbs | 第51-56页 |
| ·Adjectives | 第56-60页 |
| ·Nouns | 第60-63页 |
| ·Clausal elements | 第63-65页 |
| ·Other hedges | 第65-67页 |
| ·Distribution of hedging devices in different RA sections | 第67-69页 |
| ·A brief summary of this chapter | 第69-70页 |
| Chapter Five Findings and Discussions | 第70-80页 |
| ·Major findings | 第70-73页 |
| ·Similarities of hedging devices in the two disciplines | 第70-71页 |
| ·Disciplinary discrepancies of hedging devices | 第71-73页 |
| ·Pragmatic discussions—a case study | 第73-80页 |
| ·The use of hedges in linguistics RAs | 第73-76页 |
| ·The use of hedges in physics RAs | 第76-80页 |
| Chapter Six Implications & Conclusions | 第80-85页 |
| ·Implications for the teaching of EAP | 第80-82页 |
| ·Some limitations in the present study | 第82-83页 |
| ·Conclusion | 第83-85页 |
| Acknowledgements | 第85-86页 |
| Bibliography | 第86-91页 |
| Appendix | 第91-96页 |
| Articles Published | 第96页 |
