| Abstract | 第7-8页 |
| 摘要 | 第9-13页 |
| Chapter One Introduction | 第13-16页 |
| 1.1 Research Background | 第13-14页 |
| 1.2 Purpose and Significance of This Thesis | 第14-15页 |
| 1.3 Organization of This Thesis | 第15-16页 |
| Chapter Two Literature Review | 第16-29页 |
| 2.1 Definition of Metaphor | 第16页 |
| 2.2 Previous Studies on Metaphor | 第16-17页 |
| 2.3 Previous Studies on Conceptual Metaphor | 第17-26页 |
| 2.3.1 Previous Studies on Conceptual Metaphor Abroad | 第17-18页 |
| 2.3.2 Previous Studies on Conceptual Metaphor at Home | 第18-26页 |
| 2.4 Previous Studies of Commencement Speeches | 第26-29页 |
| Chapter Three Theoretical Framework | 第29-39页 |
| 3.1 Definition of Conceptual Metaphor | 第29-30页 |
| 3.2 Categories of Conceptual Metaphor | 第30-31页 |
| 3.3 Characteristics of Conceptual Metaphor | 第31-35页 |
| 3.3.1 The Universality of Conceptual Metaphor | 第32页 |
| 3.3.2 The Systematicity of Conceptual Metaphor | 第32-33页 |
| 3.3.3 The Experiential Basis of Conceptual Metaphor | 第33-34页 |
| 3.3.4 Conceptual Metaphor and Culture Coherence | 第34-35页 |
| 3.4 Working Mechanism of Conceptual Metaphor | 第35-39页 |
| Chapter Four Methodology | 第39-43页 |
| 4.1 Research Questions | 第39页 |
| 4.2 Data Collection | 第39-40页 |
| 4.3 Research Procedures | 第40页 |
| 4.4 Identification of Conceptual Metaphor | 第40-43页 |
| Chapter Five Results and Discussions | 第43-64页 |
| 5.1 Categories of Conceptual Metaphors Used in Chinese Commencement Speeches | 第43-45页 |
| 5.2 Categories of Conceptual Metaphors Used in American Commencement Speeches | 第45-46页 |
| 5.3 Comparative Analysis of Conceptual Metaphors Used in Chinese and American Commencement speeches | 第46-61页 |
| 5.3.1 Structure Metaphor | 第48-51页 |
| 5.3.2 Orientation Metaphor | 第51-52页 |
| 5.3.3 Ontological Metaphor | 第52-61页 |
| 5.4 Reasons for Similarities and Differences of Conceptual Metaphor in Chineseand American Commencement Speeches | 第61-64页 |
| 5.4.1 The Causes of Similarities in Chinese and American CommencementSpeeches | 第61-63页 |
| 5.4.2 The Causes of Differences in Chinese and American Commencement Speeches | 第63-64页 |
| Chapter Six Conclusion | 第64-66页 |
| 6.1 Major Findings of This Study | 第64页 |
| 6.2 Limitations and Suggestions for Further Studies | 第64-66页 |
| Bibliography | 第66-70页 |
| Acknowledgements | 第70-71页 |
| Appendixes | 第71-75页 |
