首先它无法解释我们为什么会笑？

The first thing is it doesn't really explain "why?"

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我们为什么会失去这么多的市场份额？

Why did we lose so much of the market share?

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我们不知道我们为什么会笑。

We don't know why we laugh.

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So when I expand this gas adiabatically and it cools down, why do you think it might cool down?

现在我们知道了气体绝热膨胀时,温度会下载，为什么会降温？

麻省理工公开课 - 热力学与动力学课程节选

On Thursday, we'll look at why that allows you to do lots of things more conveniently than you can do without mutation.

周四我们会探讨下,为什么这种可变性会让你,在进行很多操作的时候方便了许多。

麻省理工公开课 - 计算机科学及编程导论课程节选

We will always have r equals zero in these radial probability distribution graphs, and we can think about why that is.

在这些径向概率分布图里,总有ｒ等于０处，我们可以考虑为什么会这样。

麻省理工公开课 - 化学原理课程节选