Translation of "Nasty" in Chinese

He is nasty.

他很凶。

The coffee is nasty.

咖啡不好。

Recently there have been a lot of nasty incidents with fraud.

最近，恶性的诈骗案可真多啊。

She gives me a nasty look every time she sees me.

她每次看見我都給露出厭惡的眼神。

Regardless how many times I try to solve this nasty problem, I always end up failing.

对于这个棘手的问题，无论我尝试多少次，结果都会以失败告终。