后来，许多科学家对这些理论进行了研究，发现这些理论存在许多问题。

Afterwards, many scientists have found many questions about the theory through examining it.

youdao

后来，许多科学家对这些理论进行了研究，发现这些理论存在许多问题。

Afterwards, many scientists have found many questions about the theory through examining it.

youdao