也对研究这个课题的原因和问题进行解释和说明。

Research objectives and research questions provide a clearer direction to complete this research.

youdao

我研究这个课题多年，将有一个非常全面的图书出约释放很快，现在。

I have researched this subject for many years, and will have a very comprehensive book out about it released very soon now.

youdao