他们彼此极不和。 They don't get on at all well together/with one another.
她未曾想发牢骚无形中反倒帮了彼得的忙。 She didn't realize that by complaining she was only playing Peter's game.
我们马上发觉彼此志同道合。 We immediately realized that we were kindred spirits.
因是乔治介绍彼得与萨拉相识的，由他来作他们婚礼的男傧相是最合适的。 As George introduced Peter and Sarah it is only fit (and proper) that he should be best man at their wedding.
他们三人彼此相处愉快；一个已婚，一个仍是光棍，而另一个则已有了女友。 They three get along well with one another; one is married, another is still a bachelor, and the other has a girl friend.