本文首先介绍了选题的背景和意义。
This thesis introduces the topics of the background and significance first.
本文首先阐述选题的背景和意义。
The first selection of subjects on the background and significance.
主要阐述选题的背景和意义、研究内容、研究的方法和技术路线等。
This part mainly expounds the background and significance, methods and technical line of this paper.
应用推荐