The key point of the chapter is summery and evaluation of field study status, on which the author is based to raise the study frame and methods.

着重总结和评析了这一领域的研究现状，并在基础上提出自己的研究框架及方法。

youdao

The key point of the chapter is summery and evaluation of field study status, on which the author is based to raise the study frame and methods.

着重总结和评析了这一领域的研究现状，并在基础上提出自己的研究框架及方法。

youdao