"People can look at things and be curious about them, but if you are an explorer you want to know why and how and maybe develop an experiment to test the hypothesis."

VOA: standard.2010.06.21

Now, that is not the most general thing, but I'm sure you guys have some idea of why we are interested in that.

这并不是最普遍的情形,但我确定你们知道我们为什么喜欢它

耶鲁公开课 - 基础物理课程节选

But if you say why are they so different from humans that they don't.

但是如果你问，为什么它们与人类,如此不同？，为何它们就没有这些。

普林斯顿公开课 - 人性课程节选

But why do you think these are the number one and two now?

你们认为这两种病为什么会名列前茅

耶鲁公开课 - 生物医学工程探索课程节选

There's no reason why these two attributes had to be proportional, but they are proportional and they are equal by choice of units and you can ask, "Is this just an accident or is it part of a big picture?"

我们不知道这两个质量为何成比例,但它们确实成比例,而且如果选择合适的单位还会相等,你会问,"这种情况纯属偶然,还是这只是物理学大体系的冰山一角"

耶鲁公开课 - 基础物理课程节选