Don't listen to him; he's just a nutcase.

别听他的，他只是个疯子。

He acts like a nutcase when he gets too excited.

他一兴奋起来就像个疯子。

I felt like a nutcase talking to myself in the mirror.

我对着镜子自言自语时感觉自己像个疯子。

She called him a nutcase after he suggested the wild idea.

他提出那个疯狂的想法后，她称他为疯子。

The neighbors think he's a nutcase because of his strange behavior.

邻居们因为他的怪异行为认为他是个疯子。

The bartender thinks that this guy is a nutcase, but he wants his $1,000, so he agrees.

那招待觉得这家伙简直是个疯子，可他想赢得那1000块钱，于是便同意了。