| ACKNOWLEDGEMENTS | 第5-6页 |
| ABSTRACT | 第6-7页 |
| 摘要 | 第8-9页 |
| LIST OF ABBREVIATION | 第9-14页 |
| CHAPTER Ⅰ INTRODUCTION | 第14-18页 |
| 1.1 Research Background | 第14-15页 |
| 1.2 Research Significance and Purpose | 第15-16页 |
| 1.3 Organization of the Thesis | 第16-18页 |
| CHAPTER Ⅱ LITERATURE REVIEW | 第18-25页 |
| 2.1 Key Concepts of the Research | 第18-19页 |
| 2.2 Previous Studies on Lexical Bundles | 第19-23页 |
| 2.2.1 Previous Studies on Lexical Bundles Abroad | 第19-21页 |
| 2.2.2 Previous Studies on Lexical Bundles at Home | 第21-23页 |
| 2.3 Previous Studies on EBN | 第23-25页 |
| CHAPTER Ⅲ THEORY AND THEORETICAL FRAMEWORK | 第25-34页 |
| 3.1 Language Acquisition Theory | 第25-26页 |
| 3.2 The Dual-mode System of Second Language Acquisition | 第26-28页 |
| 3.3 Corpus-based Approach | 第28-29页 |
| 3.4 Analytical Framework of the Research | 第29-34页 |
| CHAPTER Ⅳ RESEARCH METHODOLOGY | 第34-38页 |
| 4.1 Research Questions | 第34页 |
| 4.2 Data Collection | 第34-36页 |
| 4.3 Data Processing | 第36-37页 |
| 4.4 Research Procedures | 第37-38页 |
| CHAPTER Ⅴ RESULTS AND DISCUSSION | 第38-59页 |
| 5.1 The Overall Distribution of Four-word Lexical Bundles in the Two Corpora | 第38-40页 |
| 5.2 Structural Analysis of Four-word Lexical Bundles in the Two Corpora | 第40-48页 |
| 5.2.1 Structural Analysis of Four-word Lexical Bundles in EC Corpus | 第40-43页 |
| 5.2.2 Structural Analysis of Four-word Lexical Bundles in CD Corpus | 第43-45页 |
| 5.2.3 Structural Comparison of Four-word Lexical Bundles between the TwoCorpora | 第45-48页 |
| 5.3 Functional Analysis of Four-word Lexical Bundles in the Two Corpora | 第48-56页 |
| 5.3.1 Functional Analysis of Four-word Lexical Bundles in EC Corpus | 第48-51页 |
| 5.3.2 Functional Analysis of Four-word Lexical Bundles in CD Corpus | 第51-54页 |
| 5.3.3 Functional Comparison of Four-word Lexical Bundles between TwoCorpora | 第54-56页 |
| 5.4 Analysis on Differences and Similarities of Four-word Lexical Bundles in ECand CD Corpus | 第56-59页 |
| 5.4.1 Discussion on the Similarities of Four-word lexical Bundles in the TwoCorpora | 第56-57页 |
| 5.4.2 Discussion on the Differences of Four-word lexical Bundles in the TwoCorpora | 第57-59页 |
| CHAPTER Ⅵ CONCLUSION | 第59-63页 |
| 6.1 The Major Findings of the Present Study | 第59-61页 |
| 6.2 Implications of the Present Study | 第61-62页 |
| 6.3 Limitations and Suggestions of the Study | 第62-63页 |
| WORKS CITED | 第63-68页 |
| APPENDIX Ⅰ FOUR-WORD LEXICAL BUNDLES IN EC CORPUS | 第68-71页 |
| APPENDIX Ⅱ FOUR-WORD LEXICAL BUNDLES IN CD CORPUS | 第71-76页 |
| APPENDIX Ⅲ THE TITLE OF ENGLISH BUSINESS NEWS IN EC CORPUS | 第76-90页 |
| APPENDIX Ⅳ THE TITLE OF ENGLISH BUSINESS NEWS IN CD CORPUS | 第90-103页 |
