忘恩

She was saddened by her son's ingratitude.

儿子的忘恩伤了她的心。

I can’t believe he didn’t even say thank you. How ungrateful can you get?

甚至连谢谢都没说，真让人难以相信。一个人怎这忘恩呢？

When you say such nasty things about the organization, you’re biting the hand that feeds you.

你说组的这些骯脏的话，是忘恩。

He is not the first politician to kick down the ladder by which he has risen to exalted heights.

不是第一个被抬上高位便忘恩的政客。