8.5 cease doing/to do
?
cease to do  长时间,甚至永远停做某事。
cease doing  短时停止做某事,以后还会接着做。

   That department has ceased to exist forever.
   那个部门已不复存在。
   The girls ceased chatting for a moment when their teacher passed by.
   姑娘们在老师走过时,停了会聊天。











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