| Abstract | 第1-11页 |
| 摘要 | 第11-12页 |
| Introduction | 第12-16页 |
| Chapter One Literature Review | 第16-23页 |
| ·Vagueness as a Pragmatic Phenomenon | 第16-18页 |
| ·Types of Vagueness | 第18-20页 |
| ·Previous Studies on News and News Discourse | 第20-23页 |
| Chapter Two Theoretical Framework | 第23-30页 |
| ·Introduction | 第23页 |
| ·Making Choices | 第23-24页 |
| ·Variability,Negotiability and Adaptability of Language | 第24-25页 |
| ·Four Aspects of Adaptability | 第25-28页 |
| ·Contextual Correlates of Adaptation | 第26-27页 |
| ·Structural Objects of Adaptability | 第27-28页 |
| ·Dynamics of Adaptability | 第28页 |
| ·Salience of Adaptation | 第28页 |
| ·Summary | 第28-30页 |
| Chapter Three Adaptation to the Mental World | 第30-54页 |
| ·Introduction | 第30-32页 |
| ·Adaptation to Readers' Mental World | 第32-41页 |
| ·Adaptation to Readers' Understanding Ability | 第32-35页 |
| ·Adaptation to Readers' Interests | 第35-39页 |
| ·Exciting Readers' Curiosity | 第35-37页 |
| ·Contributing to Vividness | 第37-39页 |
| ·Adaptation to Readers' Reading Habits | 第39-41页 |
| ·Adaptation to Journalists' Mental World | 第41-52页 |
| ·Adaptation to the Demand of Timely Information | 第41-43页 |
| ·Adaptation to the Demand of Precision | 第43-45页 |
| ·Adaptation to the Motivations of Journalists | 第45-52页 |
| ·The Motivation of Attracting Potential Readers | 第45-46页 |
| ·The Motivation of Self-Protection and Avoiding Problems | 第46-50页 |
| ·The Motivation to Express Attitudes and Feelings | 第50-52页 |
| ·Summary | 第52-54页 |
| Chapter Four Adaptation to the Physical World | 第54-62页 |
| ·Introduction | 第54-55页 |
| ·Adaptation to Time | 第55-58页 |
| ·Adaptation to Space | 第58-60页 |
| ·Adaptation to the Features of the Physical World | 第60-61页 |
| ·Summary | 第61-62页 |
| Chapter Five Adaptation to the Social World | 第62-75页 |
| ·Introduction | 第62-63页 |
| ·Adaptation to Cultures | 第63-66页 |
| ·Adaptation to Politeness | 第66-67页 |
| ·Adaptation to Gender Equality | 第67-69页 |
| ·Adaptation to Social Relations | 第69-74页 |
| ·Adaptation to the Young | 第69-71页 |
| ·Adaptation to Political Group | 第71-74页 |
| ·Summary | 第74-75页 |
| Conclusion | 第75-78页 |
| Bibliography | 第78-81页 |
| Acknowledgements | 第81-82页 |
| Publications | 第82-83页 |
| 学位论文评阅及答辩情况表 | 第83页 |
