We can never be careful enough (too careful) in doing such experiments.

做这样的实验，我们越仔细越好。

youdao

The students are doing the experiments carefully in the lab now.

同学们现在正在实验室里认真地做实验。

youdao

The students are doing the experiments carefully in the lab now.

同学们现在正在实验室里认真地做实验。

youdao