它通常花费不到半个小时时间。
不到半个小时，他又跑上楼来。
不到半个小时，一些主要的事情都已解决了。
Within less than half an hour, the principal business had been disposed of.
不到半个小时，所有六个隐藏的目标物都被发现了。
Within half an hour, all six of the hidden objects had been found.
一吃过晚饭，他便坐下来，不到半个小时就把作文写好了。
Immediately after supper, he sat down and knocked off his composition in half an hour.
一吃过晚饭，他便坐下来，不到半个小时就把作文写好了。
Immediately after supper, he sat down and knocked off his composition in half an hour.
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