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adj.
Someone who is two-faced is not sincere, saying unpleasant things about you to other people while seeming to be pleasant when they are with you.
某个人如果是two-faced，那么就是说他是不真诚的，对别人说你的坏话，但当他们和你在一起时却对你表现得很亲切。
两面派的;当面一套背后一套的
I don't trust her - I suspect she's a bit two-faced.
我不信任她——我觉得她有点虚伪。