到二十世纪初，科学家们认为，在更新世期间，有四次不同的冰川作用对北美和欧洲产生了影响。

By the early part of the twentieth century, scientists believed that four distinct glaciations had affected North America and Europe during the Pleistocene epoch.

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继续提供领导作用对未来至关重要。

Continued leadership is crucial to the future.

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适当的水合作用对身体好是重要的，您需要喝纯净水。

Proper hydration is vital to good health and to have that, you need to drink pure water.

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And in his role here as a mute, as an infant, Christ is serving, I think, an important function for Milton.

作为一个哑巴，一个婴儿，基督对，弥尔顿起了很重要的作用。

耶鲁公开课 - 弥尔顿课程节选

That played a powerful role in my life in terms of connecting faith and social justice for me. -Right.

那在我的生活中发挥了强大的作用,它帮助我将信仰和社会正义相连，-对。

普林斯顿公开课 - 人性课程节选

We know what prejudice has wrought historically and socially, so how can we try to vindicate it in this way?

偏见对历史对社会都发生了作用，所以我们如何证明偏见是正确的呢？

耶鲁公开课 - 文学理论导论课程节选