But, there are some problems existed in its study.

但是，实证会计研究中也存在着不少问题。

youdao

Some problems existed in Chinese re industry are pointed out.

指出了我国稀土行业存在的问题。

youdao

Some problems existed in Chinese re industry are pointed out.

指出了我国稀土行业存在的问题。

youdao