I used to trust Tom, then I found out he was a back stabber.

我曾经信任汤姆，后来才发现他是个给别人背后捅刀子的人。

youdao

I was in love with my girlfriend until I found out that she told all her friends that I were stupid, she's such a back-stabber.

我很爱我的女朋友，直到我觉察她告诉她所有的朋友我很蠢，她真是一个暗箭伤人的人。

youdao

I was in love with my girlfriend until I found out that she told all her friends that I were stupid, she's such a back-stabber.

我很爱我的女朋友，直到我觉察她告诉她所有的朋友我很蠢，她真是一个暗箭伤人的人。

youdao