| List of Abbreviation | 第1-5页 |
| List of Tables and Figures | 第5-9页 |
| Abstract in English | 第9-11页 |
| Abstract in Chinese | 第11-13页 |
| Chapter One Introduction | 第13-17页 |
| ·The Research Background | 第13-15页 |
| ·The Purpose and Significance of the Study | 第15-17页 |
| Chapter Two Literature Review | 第17-45页 |
| ·L2 Oral Fluency | 第17-27页 |
| ·Definition of L2 Oral Fluency | 第17-19页 |
| ·The Interpretative Models of Fluency Development | 第19-24页 |
| ·Levelt’s Model of Speech Production | 第20-22页 |
| ·Anderson’s ACT Theory | 第22-24页 |
| ·Previous Studies Measuring L2 Oral Fluency | 第24-27页 |
| ·Lexical Chunks | 第27-43页 |
| ·Formulaic Nature of Language | 第28-29页 |
| ·Definitions of Lexical chunks | 第29-32页 |
| ·Classification of Lexical chunks | 第32-34页 |
| ·Roles of lexical chunks in L2 acquisition | 第34-42页 |
| ·Facilitating Speech Production | 第34-35页 |
| ·Easing the Burden of Language Processing | 第35-37页 |
| ·Enhancing the Fluency and Accuracy of Speech Production | 第37-39页 |
| ·Helping Internalizing and Establishing Grammatical Rules | 第39-42页 |
| ·Empirical Studies on the relationship between Lexical chunks and L2 Oral fluency | 第42-43页 |
| ·Summary | 第43-45页 |
| Chapter Three Research Design and Methodology | 第45-59页 |
| ·Research design | 第45-48页 |
| ·Longitudinal Approach | 第45页 |
| ·Working Definitions of L2 Oral Fluency | 第45-47页 |
| ·Temporal Indices | 第45-46页 |
| ·Linguistic Indices | 第46-47页 |
| ·Performing Indices | 第47页 |
| ·Working Definitions of Lexical Chunks | 第47-48页 |
| ·Participants | 第48-50页 |
| ·Instruments | 第50页 |
| ·Oral-English Production Picture-story | 第50页 |
| ·COOL EDIT Software | 第50页 |
| ·Research Procedures | 第50-55页 |
| ·Pre-test and Post-test | 第50-51页 |
| ·Instructional Treatment to the Experimental Group | 第51-54页 |
| ·In-Class Teaching Procedures | 第51-53页 |
| ·Out-of-Class Teaching Procedures: QQ Group and E-mail | 第53-54页 |
| ·Instructional Treatment to the Control Group | 第54-55页 |
| ·Data Collection | 第55-56页 |
| ·Data Analysis | 第56-59页 |
| ·Quantitative Analysis of L2 Oral Fluency | 第56-57页 |
| ·Qualitative Analysis of Lexical Chunks | 第57页 |
| ·Native Speaker Judgment Analysis | 第57-59页 |
| Chapter Four Results and Discussion | 第59-75页 |
| ·Quantitative Results and Discussion of L2 Oral Fluency | 第59-65页 |
| ·Results and Discussion of Temporal Indices | 第59-63页 |
| ·Results and Discussion from Temporal Indices of Pretest | 第59-60页 |
| ·Results and Discussion from Temporal Indices of Posttest | 第60-63页 |
| ·Results and Discussion of Linguistic Indices | 第63页 |
| ·Results and Discussion of Performing Indices | 第63-64页 |
| ·Summary of the Quantitative Results | 第64-65页 |
| ·Qualitative Results and Discussion of lexical Chunks | 第65-75页 |
| ·Lexical Chunks Applications in EG and CG | 第65-67页 |
| ·Relationship between Lexical Chunks Numbers and Oral Fluency | 第67-69页 |
| ·Relationship between Lexical Chunks Types and Oral Fluency | 第69-75页 |
| Chapter Five Conclusion and Implications | 第75-78页 |
| ·Conclusion | 第75页 |
| ·Implications for Oral English Teaching | 第75-76页 |
| ·Limitations and Suggestions for Further Study | 第76-78页 |
| Bibliography | 第78-84页 |
| Appendix I | 第84-85页 |
| Appendix II | 第85-86页 |
| Appendix III | 第86-87页 |
| Acknowledgements | 第87-88页 |
| Publications | 第88-89页 |
| 硕士学位论文内容简介及自评 | 第89页 |
