这一点已经被许多研究所证实。

This has been validated by many studies.

youdao

但在六年前，有一项研究证实，许多游客对该博物馆已经厌倦了。

But six years ago, a study confirmed what many visitors already knew.

youdao

但在六年前，有一项研究证实，许多游客对该博物馆已经厌倦了。

But six years ago, a study confirmed what many visitors already knew.

youdao