But there have been no rigorous scientific studies of the reaction until now.

不过至今对这反应仍然没有严谨的科学研究。

youdao

So in the train, we must be rigorous and scientific, serious and...

整个训练中必须做到严谨科学、严肃认真、严格管理、严格要求。

youdao

So in the train, we must be rigorous and scientific, serious and...

整个训练中必须做到严谨科学、严肃认真、严格管理、严格要求。

youdao