They have intimate knowledge of the subject being investigated.

他们对所研究的题目非常熟悉。

youdao

They have intimate knowledge of the subject being investigated. (which is being investigated).

他们对所研究的题目非常熟悉。

youdao

They have intimate knowledge of the subject being investigated. (which is being investigated).

他们对所研究的题目非常熟悉。

youdao