| Abbreviations | 第1-9页 |
| 摘要 | 第9-11页 |
| Abstract | 第11-13页 |
| Chapter One Introduction | 第13-16页 |
| ·Background of this Study | 第13-14页 |
| ·Purposes of this Study | 第14-15页 |
| ·Organization of this Thesis | 第15-16页 |
| Chapter Two Literature Review | 第16-33页 |
| ·Theoretical Background | 第16-22页 |
| ·Keywords | 第17-21页 |
| ·Key Keywords | 第21页 |
| ·Associates | 第21-22页 |
| ·Review of Previous Empirical Studies | 第22-31页 |
| ·Lack of Theme-Prominence in Chinese English learners'Writing | 第31-32页 |
| ·Summary | 第32-33页 |
| Chapter Three Research Design | 第33-40页 |
| ·Research Questions | 第33页 |
| ·Research Corpora | 第33-35页 |
| ·Observed Corpus | 第34-35页 |
| ·Reference Corpus | 第35页 |
| ·Tools and Instruments | 第35-36页 |
| ·Procedures | 第36页 |
| ·Data Analysis | 第36-40页 |
| Chapter Four Results and Discussion | 第40-62页 |
| ·Keyword Number in L2 Timed Compositions and A-level Examination Compositions | 第40-49页 |
| ·Keyword Number in L2 Timed Compositions | 第40-45页 |
| ·Keyword Number in A-level Examination Compositions | 第45-47页 |
| ·Comparison of Keyword Number in These Two Corpora | 第47-49页 |
| ·The Distribution of Keywords in Compositions | 第49-56页 |
| ·The Distribution of Word Information in the Compositions | 第49-52页 |
| ·The Distribution of Keyword Information in the Compositions | 第52-56页 |
| ·General Keyword List of Theme-given Compositions | 第53-56页 |
| ·The Relationship between the Use of Keywords and the Quality of L2 Writing | 第56-62页 |
| ·The Relationship between the Keyword Number and the Quality of L2 Writing | 第57-60页 |
| ·The Keyword Number of Each Composition in Sub-WECCL1 | 第57页 |
| ·The Scores of Each Composition in Sub-WECCL1 | 第57-58页 |
| ·The Relationship between the Keyword Number and the Quality of L2 Writing | 第58-60页 |
| ·The Relationship between the Use of Keywords and the Quality of L2 Writing | 第60-62页 |
| Chapter Five Conclusion | 第62-66页 |
| ·Major Findings | 第62-64页 |
| ·Implications | 第64页 |
| ·Limitations and Suggestions for Further Research | 第64-66页 |
| References | 第66-69页 |
| Acknowledgements | 第69页 |
