It was a time of rapid changes in American society.

VOA: special.2010.08.05

In that case, we understand it as a sequence of cross-sections rather than something that somehow organically changes through time.

这样，我们就是在学习一个个语言的横截面,而不是语言自然的变化过程。

耶鲁公开课 - 文学理论导论课程节选

It was the first time a country had taken action on that, so these are very positive public health changes.

这是第一次国家政府对此采取措施,这都是些对大众健康很有益的改变

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

It turned out to be more of a utility than anything else, a utility that people can use to build products on top of and use to form social groups and it changes it every time they use it.

FORBES: Jack Dorsey On Social Change: "It's Not Fun All The Time To Be Self-Aware"

The world economy is not a frozen thing, it changes over time.

BBC: NEWS | Business | China 'may see greater IMF role'

Like all changes, it takes time for the customers to feel it and provide changes to their perceptions.

FORBES: Connect