忘恩

She was saddened by her son's ingratitude.

儿子忘恩伤了她心。

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

你说组织骯脏话，是忘恩。

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

他甚至连谢谢都没说，真让人难以相信。一人怎么可能么忘恩呢？

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

他不是第一被抬上高位便忘恩政客。