| Acknowledgements | 第1-7页 |
| Abstract | 第7-9页 |
| 摘要 | 第9-11页 |
| Contents | 第11-15页 |
| Abbreviations | 第15-16页 |
| List of Tables | 第16-19页 |
| List of Figures | 第19-20页 |
| Chapter 1 Preliminaries | 第20-27页 |
| ·Introduction | 第20页 |
| ·Rationale for the Research | 第20-21页 |
| ·Objectives and Research Questions | 第21-23页 |
| ·Data and Methodology | 第23-25页 |
| ·Organization of the Dissertation | 第25页 |
| ·Summary | 第25-27页 |
| Chapter 2 Literature Review | 第27-43页 |
| ·Introduction | 第27页 |
| ·Review of the Studies on Discourse Analysis | 第27-35页 |
| ·An Introduction to Discourse and Discourse Analysis | 第27-29页 |
| ·Traditional Approach to Discourse Analysis | 第29-31页 |
| ·Systemic Functional Discourse Analysis | 第31-35页 |
| ·Review of the Studies on Political Speech Discourse | 第35-39页 |
| ·Political Speech as a Discourse | 第35-37页 |
| ·Study of Political Speech Discourse at Home and Abroad | 第37-39页 |
| ·Review of the Studies on Register | 第39-42页 |
| ·Register and Other Disciplines | 第39-40页 |
| ·Register and Discourse Analysis | 第40-42页 |
| ·Summary | 第42-43页 |
| Chapter 3 Theoretical Framework | 第43-64页 |
| ·Introduction | 第43页 |
| ·Historical Development of Register Theory | 第43-47页 |
| ·Malinowski's Contribution to the Context of Situation | 第43-45页 |
| ·Firth's View on the Context of Situation | 第45-46页 |
| ·Halliday's Register Theory | 第46-47页 |
| ·Basic Principles of Register Theory | 第47-63页 |
| ·The Three Features of the Context of Situation | 第48-52页 |
| ·Field of Discourse | 第48-49页 |
| ·Tenor of Discourse | 第49-51页 |
| ·Mode of Discourse | 第51-52页 |
| ·The Three Metafunctions of the Semantic System | 第52-60页 |
| ·The Experiential Metafunction | 第52-55页 |
| ·The Interpersonal Metafunction | 第55-58页 |
| ·The Textual Metafunction | 第58-60页 |
| ·The Relationship between the Context and the Text | 第60-63页 |
| ·Summary | 第63-64页 |
| Chapter 4 A Study of Obama's Two Political Speeches in Light of Register Theory | 第64-95页 |
| ·Introduction | 第64页 |
| ·Register Analysis of Obama's Speech in Shanghai | 第64-66页 |
| ·Register Analysis of Obama's Address to the Nation on Libya | 第66-67页 |
| ·A Study of the Two Political Speeches by Obama from the Perspective of Register Theory | 第67-93页 |
| ·Realization of Experiential Metafunction of the Two Political Speeches | 第67-76页 |
| ·Transitivity in Obama's Speech in Shanghai | 第68-72页 |
| ·Transitivity in Obama's Address to the Nation on Libya | 第72-76页 |
| ·Realization of Interpersonal Metafunction of the Two Political Speeches | 第76-85页 |
| ·Mood and Modality in Obama's Speech in Shanghai | 第77-81页 |
| ·Mood and Modality in Obama's Address to the Nation on Libya | 第81-85页 |
| ·Realization of Textual Metafunction of the Two Political Speeches | 第85-93页 |
| ·Thematic Structure and Cohesion in Obama's Speech in Shanghai | 第85-89页 |
| ·Thematic Structure and Cohesion in Obama's Address to the Nation on Libya | 第89-93页 |
| ·Summary | 第93-95页 |
| Chapter 5 A Contrastive Interpretation of Obama's Two Political Speeches in Light of Register Theory | 第95-104页 |
| ·Introduction | 第95页 |
| ·The Relationship between the Register Analysis and the Realization of Three Metafunctions | 第95-101页 |
| ·Field of Discourse and the Realization of Experiential Metafunction | 第95-97页 |
| ·Tenor of Discourse and the Realization of Interpersonal Metafunction | 第97-99页 |
| ·Mode of Discourse and the Realization of Textual Metafunction | 第99-101页 |
| ·Discussion and Evaluation of the Two Political Speeches in Light of Register Theory | 第101-103页 |
| ·Summary | 第103-104页 |
| Chapter 6 Conclusion | 第104-110页 |
| ·Introduction | 第104页 |
| ·A Summarizing Overview | 第104-108页 |
| ·Implications of the Research | 第108页 |
| ·Limitations and Suggestions for Further Studies | 第108-110页 |
| References | 第110-114页 |
| Appandix Ⅰ | 第114-119页 |
| Appendix Ⅱ | 第119-125页 |
