回答

・bite the hand that feeds you
・return evil for good

「恩將報仇」英語是 bite the hand that feeds you 或是 return evil for good 來表達。

I've invested so much for you, but you bit the hand that feeds you!
（我為你投資了那麼多，你居然恩將仇報！）

If I testify about it, it means, I return evil for good against him.
（如果我去作證，就表示我對他恩將仇報。）
※ testify（作證）。

有幫助｜0