会议一结束，这个人就被要求辨认四张图片中哪一张被使用过。
Once the session was over, this person was asked to identify which of the four images had been used.
会议一结束，他们就都回家了。
明知道会议一结束，大量的文件就面临被销毁的命运，又何必把它们打印出来呢。
Why print off bulky documents whose only fate is to be shredded after the meeting is over?
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