1. one after another 一个接一个地，一个又一个地。如：They left the room one after another. 他们一个一个地离开了房间。We achieved victories one after another. 我们取得了一个又一个的胜利。注：按传统语法，one after another 指三者或三者以上，若指两者则用 one after the other, 但在现代英语中，两者常可换用。如：Difficulties arose one after another [the other]. 问题一个一个地冒了出来。另外，One after another 通常用作状语，有时用作主语。如：
One after another stood up and went out. 人们一个一个地站起来，走了出去。

人们一个一个地站起来，走了出去。

 2. one another 相互，彼此。如：We should help one another. 我们应该互相帮助。The members of the team support one another. 队员们相互支持。注：有人认为 one another 一定用于三者或三者以上， 而用于两者须用 each other。但在现代英语中，两者常可换用。The boy and girl are deeply in love with one another [each other]. 这男孩和女孩深深地相爱着。The sea and the sky seem to melt into one another [each other]. 大海与蓝天似乎融为一体。另外，one another 可以有所有格形式。如：Those two are always copying one another’s [each other’s] homework. 那两个人总是相互抄袭作业。