在一段时间内 When we were at school, we went to the library every day ; over a period of time ; Energon Recharger
所有这些变化都是在一段时间内发生的。
在短短的一段时间内，一群完全不为人知的人已始创了一种新式幽默。
Within a short space of time a group of complete unknowns had established a wholly original form of humour.
它在青年时期达到顶峰，在一段时间内趋于平稳，然后普遍会开始随着年龄的增长而缓慢下降。
It peaks in young adulthood, levels out for a period of time, and then generally starts to slowly decline as we age.
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