所有这些变化都是在一段时间内发生的。

All these changes happened over a period of time.

《牛津词典》

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.

《柯林斯英汉双解大词典》

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.

youdao

It is also pretty clear that for some after the foundation of the polis, there were no city walls.

而且很明显,在城邦建立起来之后的相当长的一段时间内,都没有城墙

耶鲁公开课 - 古希腊历史简介课程节选

Well, this shows what happened in the period after this vaccine was introduced into the general population so that would have been in 1954.

这表明了,疫苗在一九五四年,引入大众后的一段时间内,发生了什么样的情况

耶鲁公开课 - 生物医学工程探索课程节选

And the company grew 80%per year for the first eight years compounded, and 60 % per year for the six years after that, which adds up to tens of billions real quick, as you know.

公司保持百分之八十的年增长,持续了八年，这之后的六年，每年增长百分之六十，正如你们所知，在很短的,一段时间内赚了数百亿。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选