| 摘要 | 第4-5页 |
| Abstract | 第5-6页 |
| List of Abbreviations | 第9-10页 |
| List of Tables | 第10-11页 |
| List of Figures | 第11-13页 |
| Introduction | 第13-15页 |
| Chapter 1 Literature Review | 第15-22页 |
| 1.1 Studies on English Monophthongs | 第15-21页 |
| 1.1.1 Studies abroad | 第16-19页 |
| 1.1.2 Studies at home | 第19-21页 |
| 1.2 Limitations of Previous Studies | 第21-22页 |
| Chapter 2 Theoretical Framework | 第22-27页 |
| 2.1 Sociophonetics and Language Variation | 第22-24页 |
| 2.2 Speech Learning Model | 第24-27页 |
| Chapter 3 An Empirical Study of English Monophthongs by College Students in China | 第27-61页 |
| 3.1 Vowel Systems in English,Chinese Mandarin and Tibetan | 第27-29页 |
| 3.2 Data Collection | 第29-33页 |
| 3.2.1 Selection of Subjects | 第29-30页 |
| 3.2.2 Selection of the Linguistic Variables | 第30-32页 |
| 3.2.3 Measurements | 第32-33页 |
| 3.3 DataAnalysis, Findings and Discussions | 第33-61页 |
| 3.3.1 Features of Monophthongs by Chinese Mandarin Speakers | 第33-39页 |
| 3.3.2 Features of the Monophthongs Produced by Tibetan Speakers | 第39-42页 |
| 3.3.3 Comparison of the Acoustic Features of the Monophthongs by Chinese Mandarin Speakers and British Broadcasters | 第42-52页 |
| 3.3.4 Comparison of the Acoustic Features of the Monophthongs by Tibetan Students and British Broadcasters | 第52-61页 |
| Conclusions | 第61-64页 |
| References | 第64-69页 |
| Acknowledgements | 第69-70页 |
| Appendix 1 | 第70页 |
