◎ 两回事 liǎng huí shì[two entirely different things;two different matters;horse of another (different) color] 指彼此无关的两种事物。也说“两码事” -----------------国语辞典：两种迥然不同的事情。如：「率性而为与不负责任是两回事，你不要混为一谈。」也作「两码事」。
◎ 两面讨好 liǎngmiàn tǎohǎo[trim;be on both sides of the fence; fuctuate between two parties so as to appear to favour each; run with the hare and hunt with the hounds; try to keep favour of both sides] 在两派之间摇摆或保持中间立场以讨好双方的人 两面讨好,以求万全