| Acknowledgements | 第1-5页 |
| Abstract in Chinese | 第5-7页 |
| Abstract in English | 第7-11页 |
| 1. Introduction | 第11-14页 |
| 2. Literature Review | 第14-24页 |
| ·Views on Economy in Linguistic Theories | 第14-18页 |
| ·Economy within functionalism and the principle of least effort | 第14-15页 |
| ·Some other interpretations of the principle of economy | 第15-18页 |
| ·Views on Economy in Pragmatic Theories | 第18-24页 |
| ·Classical Griean Theory | 第18-19页 |
| ·Neo-Gricean Theory | 第19-22页 |
| ·Relevance Theory | 第22-24页 |
| 3. Different Reflections of Economy at Linguistic Level | 第24-42页 |
| ·Contrast at Phonological Level | 第24-27页 |
| ·Differences in Phoneme | 第24-25页 |
| ·Differences in Phonological Change | 第25-27页 |
| ·Flexibility and Practicability | 第27页 |
| ·Contrast at Lexical Level | 第27-34页 |
| ·Differences in Basic Lexemes | 第27-28页 |
| ·Differences in Shortening | 第28-31页 |
| ·Differences in Homonymy | 第31-33页 |
| ·Differences in Word Class | 第33-34页 |
| ·Contrast at Syntactic Level | 第34-42页 |
| ·Differences in Transform of Sentence Patterns | 第34-35页 |
| ·Differences in Ellipsis of Sentence Components | 第35-42页 |
| 4. Different Reflections of Economy at Pragmatic Level | 第42-52页 |
| ·Contrast in Cooperative Principles | 第42-44页 |
| ·Contrast in Computer-mediated Communication | 第44-49页 |
| ·Graphic Symbol | 第46-47页 |
| ·Alphabet and Number | 第47-49页 |
| ·Economy and Clarity | 第49-52页 |
| 5. Conclusion | 第52-54页 |
| Bibliography | 第54-55页 |
