实用口语：He can be trying at times.

Trying 烦人的(annoying), 难处理的，难搞的 (difficult to deal with)

e.g. I had a very trying day at work. 我今天上班的时候很累很烦。

e.g. He can be trying at times. 他有时候挺烦人的。

e.g. Today’s been very trying. I can’t wait for the weekend. 今天很累很烦，等不及过周末了。