| 摘要 | 第4-6页 |
| Abstract | 第6-7页 |
| Contents | 第8-10页 |
| Introduction | 第10-14页 |
| Chapter One Literature Review | 第14-22页 |
| 1.1 Previous Studies on Trilingual Research | 第14-18页 |
| 1.1.1 Previous Studies on Trilingual Research Abroad | 第14-16页 |
| 1.1.2 Previous Studies on Trilingual Research in China | 第16-18页 |
| 1.2 The Limitations of the Previous Studies on Trilingual Research | 第18-20页 |
| 1.3 Prospect of Applying Prototype Theory to the Study of Basic Level Categories | 第20-22页 |
| Chapter Two Theoretical Framework | 第22-45页 |
| 2.1 Classical Categorization | 第23-27页 |
| 2.2 Prototype Categorization | 第27-38页 |
| 2.2.1 The Linguistic Theoretical Basis | 第28-30页 |
| 2.2.2 The Philosophical Theoretical Basis | 第30-38页 |
| 2.3 Levels of Categorization | 第38-45页 |
| 2.3.1 Basic Level | 第38-42页 |
| 2.3.2 Super ordinate Level | 第42-43页 |
| 2.3.3 Subordinate Level | 第43-45页 |
| Chapter Three Data Analysis of the Study | 第45-77页 |
| 3.1 The Design of the Survey in this Study | 第45-50页 |
| 3.1.1 The Purpose of the Survey | 第46页 |
| 3.1.2 Reasons for Choosing the Categories | 第46-48页 |
| 3.1.3 The Subjects of the Survey | 第48-49页 |
| 3.1.4 The Methods and Steps in the Survey | 第49-50页 |
| 3.2 Basic Level Vocabularies in Natural Categories | 第50-64页 |
| 3.2.1 Basic Level Vocabularies in Animal Category | 第50-58页 |
| 3.2.2 Basic Level Vocabularies in Plant Category | 第58-64页 |
| 3.3 Basic Level Vocabularies in Artificial Categories | 第64-77页 |
| 3.3.1 Basic Level Vocabularies in Utensil Category | 第65-70页 |
| 3.3.2 Basic Level Vocabularies in Clothing Category | 第70-77页 |
| Chapter Four Applications of the Study | 第77-82页 |
| 4.1 Applications for Cross Cultural Communication | 第77-79页 |
| 4.2 Applications for Language Teaching | 第79-80页 |
| 4.3 Applications for the Survival of Languages | 第80-82页 |
| Conclusion | 第82-85页 |
| Bibliography | 第85-90页 |
| Acknowledgements | 第90页 |
