| 摘要 | 第1-6页 |
| Abstract | 第6-13页 |
| List of Abbreviations | 第13-14页 |
| Chapter One Introduction | 第14-17页 |
| ·Background of the Study | 第14-15页 |
| ·Significance of the Study | 第15页 |
| ·Objectives of the Study | 第15-16页 |
| ·Organization of the Paper | 第16-17页 |
| Chapter Two Literature Review | 第17-28页 |
| ·Definition of Lexical Chunks | 第17页 |
| ·A Review of Related Studies about Lexical Chunks | 第17-22页 |
| ·Related Studies about Lexical Chunks Abroad | 第17-20页 |
| ·Related Studies about Lexical Chunks at Home | 第20-22页 |
| ·Definition of Polywords | 第22页 |
| ·Definition of Corpus-based Approach | 第22-23页 |
| ·A Review of Related Corpus-based Studies | 第23-26页 |
| ·Related Corpus-based Studies Abroad | 第23-24页 |
| ·Related Corpus-based Studies at Home | 第24-26页 |
| ·Critical Discussions of Corpus-based Studies on Polywords | 第26-28页 |
| Chapter Three Theoretical Framework | 第28-40页 |
| ·Lexical Chunks | 第28-34页 |
| ·Theories of Lexical Chunks | 第28-29页 |
| ·Classification of Lexical Chunks | 第29-33页 |
| ·Functions of Lexical Chunks | 第33-34页 |
| ·Polywords | 第34-36页 |
| ·Theories of Polywords | 第34-35页 |
| ·Classification of Polywords | 第35-36页 |
| ·Functions of Polywords | 第36页 |
| ·Development of Polywords in the Study | 第36-38页 |
| ·Definition of Polywords in the Study | 第36-37页 |
| ·Classification of Polywords in the Study | 第37-38页 |
| ·Operational Model of the Study | 第38-40页 |
| Chapter Four Methodology | 第40-50页 |
| ·Research Questions | 第40页 |
| ·Research Corpora Used in the Study | 第40-44页 |
| ·Introduction to the Two Corpora | 第40-41页 |
| ·Comparability of the Two Corpora | 第41-43页 |
| ·Establishment of the Two Corpora | 第43-44页 |
| ·Research Instruments | 第44-45页 |
| ·Research Procedures | 第45-47页 |
| ·The Set-up of the Selection of Polywords | 第45页 |
| ·The Automatic Retrieval of Polywords | 第45-47页 |
| ·The Manual Selection of Polywords | 第47页 |
| ·The Operation of Random Sampling | 第47页 |
| ·Data Collection | 第47-50页 |
| Chapter Five Data Analysis and Discussions | 第50-71页 |
| ·Initial Data Analysis | 第50-52页 |
| ·Detailed Data Analysis and Discussions | 第52-71页 |
| ·Features of Polywords Used in NSC | 第53-55页 |
| ·Features of Polywords Used in NNSC | 第55-60页 |
| ·Differences between NSC and NNSC | 第60-66页 |
| ·Typical Errors of Polywords in NNSC | 第66-71页 |
| Chapter Six Conclusions | 第71-75页 |
| ·Findings | 第71-72页 |
| ·Implications | 第72-73页 |
| ·Limitations | 第73-75页 |
| Acknowledgements | 第75-76页 |
| Bibliography | 第76-79页 |
| Appendices | 第79-95页 |
| Academic Achievements | 第95页 |
