披著羊皮的狼 的英文怎麼說?

[1] hide malicious intent under the guise of kindliness[2] a wolf in sheep's clothing[3] pretend to be a good friend but secretly want to hurt somebody or take advantage of somebody

形容一個看似是好人，卻是有惡意或想加害於你，白話翻譯就可以，如「此人笑裡藏刀，你得小心他」可翻譯成：

He seems to hide malicious intent under the guise of kindliness. Be careful of him.

而 a wolf in sheep's clothing 是美國成語，字面的意思就是披著羊皮的狼，也有笑裡藏刀的意思。

P.S. 國文字典說「笑裡藏刀」比喻外貌和善可親，內心卻陰險。