He's a snake in the grass. While pretending to be your friend he was slandering you behind your back.

他是个暗敌,表面上装作是你的朋友,背地里却在诽谤你.

《现代汉英综合大词典》

Don't trust him, he looks honest but he's a snake in the grass.

别相信他, 他看起来老实,其实极其阴险.

辞典例句

Seeing a snake in the grass, the cat drew back.

那只猫在草地里见到一条蛇, 它缩了回去.

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Be careful! There might a snake in the grass.

小心草丛里可能会有蛇!

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Jim: He did! What a snake in the grass!

吉姆: 他竟然做出这种事! 真是个卑鄙的家伙!

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A snake in the grass.

切莫打草惊蛇.

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There is a snake in the grass.

绿草如茵须防蛇.

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You're such a snake in the grass, boy.

你真是个阴险的人, 小子.

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Being a snake in the grass , Mr. Chen has drifted apart from his friends.

(陈先生是个暗箭伤人的人, 所以他的朋友疏远他. )

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He is a snake in the grass because he sold his best friend down the river.

他居心叵测,因为他出卖了他最好的朋友.

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