| Acknowledgements | 第5-6页 |
| 摘要 | 第6-8页 |
| Abstract | 第8-10页 |
| Chapter 1 Introduction | 第13-19页 |
| 1.1 Research Background | 第13-14页 |
| 1.2 Research Purpose | 第14-15页 |
| 1.3 Research Questions and Methodology | 第15-16页 |
| 1.4 Significance of the Research | 第16-17页 |
| 1.5 Structure of the Thesis | 第17-19页 |
| Chapter 2 Literature Review | 第19-31页 |
| 2.1 Vague Language | 第19-23页 |
| 2.1.1 Vagueness, Ambiguity and Generality | 第19-22页 |
| 2.1.2 Definition of Vague Language | 第22-23页 |
| 2.2 Previous Researches on Vague Language | 第23-26页 |
| 2.2.1 Researches Abroad | 第23-24页 |
| 2.2.2 Researches at Home | 第24-26页 |
| 2.3 Previous Researches on Presidential Television Debate | 第26-28页 |
| 2.3.1 Definition of Presidential Television Debate | 第26-27页 |
| 2.3.2 Studies on Presidential Television Debate at Home and Abroad | 第27-28页 |
| 2.4 Previous Researches on Adaptation Theory both at Home and Abroad | 第28-31页 |
| Chapter 3 Theoretical Framework | 第31-40页 |
| 3.1 Background of Adaptation Theory | 第31-33页 |
| 3.2 Language Use and Choices | 第33-34页 |
| 3.3 Variability, Negotiability and Adaptability | 第34-35页 |
| 3.4 Four Angles of Investigation | 第35-40页 |
| Chapter 4 Analysis of Vague Language in Presidential Television Debate from the Perspective of Adaptation Theory | 第40-76页 |
| 4.1 Realization of Vague Language and Adaptive Analysis | 第40-63页 |
| 4.1.1 Vague Language in Presidential Television Debate | 第40-56页 |
| 4.1.2 Adaptation to the Contextual Correlates | 第56-63页 |
| 4.2 Functional Analysis and Discussion | 第63-76页 |
| 4.2.1 Informative Function | 第64-67页 |
| 4.2.2 Interactive Function | 第67-76页 |
| Chapter 5 Conclusion | 第76-79页 |
| 5.1 Summary and Implication | 第76-78页 |
| 5.2 Limitations and Suggestions for Further Study | 第78-79页 |
| Bibliography | 第79-85页 |
| Papers Published During the Study for M. A. Degree | 第85页 |
