他感觉不舒服。但他仍然去上班，并且努力集中精神工作。

He was feeling bad. He went to work, however, and tried to concentrate.

《牛津词典》

我无法集中精神工作。

I can't keep my mind on work.

youdao

如果我知道会被打搅，我就不能集中精神工作。 而一旦我感觉到我的工作将被打断，我什么都做不到。

If I know that I am going to be interrupted, I can't concentrate, and if I suspect that I might be interrupted, I can't do anything at all.

youdao