| Abstract in English | 第1-8页 |
| Abstract in Chinese | 第8-9页 |
| List of Tables | 第9-10页 |
| Abbreviations | 第10-11页 |
| Introduction | 第11-13页 |
| Chapter One Literature Review | 第13-31页 |
| ·An Overview of Hedging/Hedges | 第13-21页 |
| ·Concepts of Hedging/Hedges | 第13-15页 |
| ·Categorizations of Hedges | 第15-18页 |
| ·Functions of Hedging/Hedges | 第18-21页 |
| ·An Introduction to Abstracts in Scientific Writing | 第21-23页 |
| ·The Nature of Scientific Writing | 第21-22页 |
| ·The Nature of Abstract Writing | 第22-23页 |
| ·A Brief Review of Studies of Hedging in Scientific Writing | 第23-28页 |
| ·Studies of Hedging in Research Articles in China | 第23-25页 |
| ·Studies of Hedging in Research Articles Abroad | 第25-28页 |
| ·Insights for the Present Study | 第28页 |
| ·Theoretical Framework | 第28-31页 |
| ·Working Definition of Hedging/Hedges in the Present Study | 第28-29页 |
| ·Categorization of Hedging/Hedges in the Present Study | 第29-31页 |
| Chapter Two Methodology | 第31-37页 |
| ·Research Objectives | 第31-32页 |
| ·Motivation of the Study | 第31页 |
| ·Research Questions | 第31-32页 |
| ·Data Collection | 第32-35页 |
| ·Criteria for Selecting Data | 第32页 |
| ·The Corpora Used in the Present Study | 第32-33页 |
| ·The Source of Corpora for the Present Study | 第33-35页 |
| ·Data Processing | 第35-37页 |
| ·Identification of Hedges in Both Corpora | 第35-36页 |
| ·Analysis Approaches | 第36-37页 |
| Chapter Three Results and Discussion | 第37-86页 |
| ·A General Profile of the Results | 第37-38页 |
| ·Frequency of Hedging in Both Corpora | 第38-73页 |
| ·Lexical Hedges | 第38-65页 |
| ·Strategic Hedges | 第65-69页 |
| ·Others | 第69-73页 |
| ·Distribution of Hedging in Both Corpora | 第73-77页 |
| ·Structure of an Abstract | 第73-74页 |
| ·Distribution of Hedging in Each Part of Abstract | 第74-77页 |
| ·Summary of the Results | 第77-81页 |
| ·Similarities in Hedging Use Between Two Corpora | 第77-78页 |
| ·Differences in Hedging Use Between Two Corpora | 第78-81页 |
| ·Discussion | 第81-86页 |
| ·Possible Reasons for the Differences Between Two Corpora | 第81页 |
| ·Discussion from the Pragmatic Perspective | 第81-86页 |
| Conclusion | 第86-89页 |
| Appendix A | 第89-93页 |
| Appendix B | 第93-97页 |
| Bibliography | 第97-103页 |
| Acknowledgements | 第103-104页 |
| 学位论文评阅及答辩情况表 | 第104页 |
