忘恩

She was saddened by her son's ingratitude.

儿子忘恩负义伤了。

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

你说组织这些骯脏话，是忘恩负义。

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，真让人难相信。一人怎么可能这么忘恩负义呢？

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

他不是第一被抬高位便忘恩负义政客。