世界正在迅速变化，我们应该跟上变化的步伐。

The world is changing rapidly, and we should keep up with the pace of change.

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实际上变化是不可以避免的。

In fact, change is inevitable.

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他们必须跟上变化的步伐。

They have to keep abreast of change.

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extending the issue of the two-parent versus one-parent family is, "To what extent are these notions validated " cross-culturally?"

将双亲和单亲家庭的问题扩展了一下，“这些概念究竟在多大程度上,会因跨文化差异而有所变化“

耶鲁公开课 - 心理学导论课程节选

Sometimes subtle changes in the structure of a protein can convert it from an active state into an inactive state.

有时蛋白质结构上一些很小的变化,就能将其由激活态转变为非激活态

耶鲁公开课 - 生物医学工程探索课程节选

Energy may be favoring reaction in one direction, toward let's say products that have lower energy.

能量上的变化可能支持反应，向着产物具有更低能量的方向进行。

麻省理工公开课 - 热力学与动力学课程节选