你是因为太累了才精神不好，好好地度一个假就会使你恢复的。

You're feeling low because you're overtired; a good holiday will pull you out.

youdao

因为我今天精神不好的关系，我在工作的时候就犯了个巨大的错。

I made a huge mistake in my job since I was absent-minded.

youdao

这并不意味着你午餐吃的太多了，或你精神不好或平时没有足够的锻炼。

It doesn't mean you had a big lunch, or that you're depressed, or you're not getting enough exercise.

youdao