他们已经到了必须彼此分手的地步。 They have reached the point where they have to separate with each other.
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.
这些争论彼此势均力敌。 These arguments cancel each other out.
他们是彼此争夺第一名的老对手。 They are old rivals vying with each other for first place.
他们表达了彼此之间的爱慕。 They show reciprocal affection to each other.
他们彼此憎恨。 They hate each other.
争论是不可避免的，因为他们彼此非常厌恶。 An argument was inevitable because they disliked each other so much.