基于上述背景，本文主要通过以下思路进行研究：首先，理论研究。

Based on the above background, this paper studies is mainly through the following ideas: First, study of the theory.

youdao

基于上述背景，本文主要通过以下思路进行研究：首先，理论研究。

Based on the above background, this paper studies is mainly through the following ideas: First, study of the theory.

youdao