He's two-faced. 他是双面人.
He's a fence straddler. 他是墙头草, 风吹两边倒. He's a double talker. 他见人说人话, 见鬼说鬼话.
He's a back stabber. 他会在背后捅人一刀. You're a Benedict Arnold. 你是反贼.
You're nothing but a bunch of Judases. 你们只不过是一群叛徒. He knows which side his bread is buttered on. 他晓得谁是他的衣食父母 I won't do anything behind your back. 我不会在你背后搞鬼.
