题目内容：

'How do you know when it's over?'的意思是什么
Other times,people search for the answer to a more complicated question.You can ask 'How do you know when it's over?' but the answer might not make you happy.原文

优质解答

其他时候,人们搜索更复杂问题的答案时,你会问“你怎么知道它何时会结束?” 但是答案也许不会使你高兴.