1. 研究目的与意义（文献综述包含参考文献）

2.literature review

this chapter gives a detailed introduction of previous studies in the field with which this study is closely linked. it starts with definitions and concepts of some important terms related to vocabulary knowledge. after that, previous researches on vocabulary and reading comprehension are introduced. at the end of this part, the research gap is discussed.

2.1 definitions

2. 研究的基本内容、问题解决措施及方案

3.methodology

this part declares the main body of this experiment, including how to design the research, how to collect the data, and how to analyze the data.