In this part, the basic conclusions of this paper and needs further study are given.

第七章为结束语，提出了本文的基本结论及有待进一步研究的问题。

youdao

In this part, the basic conclusions of this paper and needs further study are given.

第七章为结束语，提出了本文的基本结论及有待进一步研究的问题。

youdao