表“阶段”他们是同义词.相互可以通用,period比stage,phase常用,强调一段时间. Negotiations were at a crucial stage. 谈判正处于一个关键的阶段. The child is going through a difficult phase. 那孩子正经历困难的阶段. She'll be away for an indefinite period. 她将离开一段时间,何时回来未定. It was a period of innovation. 这是革新时期.
