Mainly introducing three aspects: the research purpose, range of research and the method of study.

主要阐述了研究目的、研究范围和研究方法三个方面。

youdao

Mainly introducing three aspects: the research purpose, range of research and the method of study.

主要阐述了研究目的、研究范围和研究方法三个方面。

youdao