| Abstract in Chinese | 第5-6页 |
| Abstract in English | 第6-7页 |
| Chapter One Introduction | 第14-19页 |
| 1.1 Research Background | 第14-16页 |
| 1.2 Necessity of the Study | 第16-17页 |
| 1.3 Significance of the Study | 第17页 |
| 1.4 Organization of the Study | 第17-19页 |
| Chapter Two Literature Review | 第19-34页 |
| 2.1 Introduction to Lexical Bundles | 第19-28页 |
| 2.1.1 Origin of Lexical Bundles | 第19-22页 |
| 2.1.2 Definition and Characteristics of Lexical Bundles | 第22-25页 |
| 2.1.3 Classification of Lexical Bundles | 第25-28页 |
| 2.2 Relevant Studies on Lexical Bundles | 第28-31页 |
| 2.2.1 Researches Abroad | 第28-30页 |
| 2.2.2 Researches at Home | 第30-31页 |
| 2.3 Introduction of L2 Writing | 第31页 |
| 2.4 Relevant Studies on Second Language Writing | 第31-34页 |
| 2.4.1 Researches Abroad | 第32页 |
| 2.4.2 Researches at Home | 第32-34页 |
| Chapter Three Theoretical Basis of Lexical Bundles | 第34-39页 |
| 3.1 Frequency of Lexical Bundles | 第34-35页 |
| 3.2 Identification of Lexical Bundles | 第35-37页 |
| 3.2.1 Introduction to Identification of Lexical Bundles | 第35-36页 |
| 3.2.2 The Length of Lexical Bundles | 第36-37页 |
| 3.3 Classification of Target Lexical Bundles | 第37-39页 |
| Chapter Four Research Methodology | 第39-49页 |
| 4.1 Research Objectives and Research Questions | 第39-40页 |
| 4.2 Data Collection | 第40-44页 |
| 4.2.1 Chinese EFL Learners Time-controlled Argumentative Writing Corpus(CLTAWC) | 第41页 |
| 4.2.2 Louvain Corpus of Native Speakers Essays | 第41-43页 |
| 4.2.3 Chinese EFL Learners Time-controlled Expository Writing andArgumentative Writing | 第43-44页 |
| 4.2.4 Data on English Proficiency and Frequency Use of Target Bundles | 第44页 |
| 4.2.5 Manual Filtering and Input of Corpora Data | 第44页 |
| 4.3 Software Used in the Study | 第44-45页 |
| 4.4 Retrieval of Lexical Bundles | 第45-47页 |
| 4.5 Manual Filtering of Lexical Bundles | 第47-48页 |
| 4.6 Statistical Analysis Method of the Data | 第48页 |
| 4.7 Proficiency Measurement | 第48-49页 |
| Chapter Five Data Analysis and Result Discussion | 第49-61页 |
| 5.1 General Analysis of Target Lexical Bundles in Corpora | 第49-59页 |
| 5.1.1 General Analysis of Target Lexical Bundles in Native and Non-nativeArgumentative Corpora | 第49-54页 |
| 5.1.2 General Analysis of Target Lexical Bundles in Argumentative andExpository Corpora | 第54-59页 |
| 5.2 Correlations between English Proficiency and Frequency Use of LexicalBundles | 第59-61页 |
| Chapter Six Conclusion and Teaching Implication | 第61-66页 |
| 6.1 Major Findings of the Study | 第61-63页 |
| 6.2 Teaching Implications | 第63-64页 |
| 6.3 Limitations and Suggestions for Further Study | 第64-66页 |
| References | 第66-74页 |
| Paper Published in the Period of M. A. Education | 第74-75页 |
| Acknowledgements | 第75-76页 |
