这项研究缺乏确凿的证据，因此，其结论值得怀疑。

The research lacks solid evidence, and therefore, its conclusions are doubtful.

youdao

他让大家注意，尚缺乏确凿的证据。

He drew attention to the absence of definite proof.

youdao

他让大家注意，尚缺乏确凿的证据。

He drew attention to the absence of definite proof.

youdao