如何翻译“两面派”

■他喜欢耍两面派。

He likes to play the double game.

■那个家伙原来是个两面派。

That fellow proved to be a double-dealer.

■我知道怎样对付两面派，而且一眼就能看出谁是一贯两面讨好的人。

I know how to handle two-faced people and can even tell at the first glance who are in the habit of running with the hare and hunting with the hounds.