Those of you who think it's not okay, none of these, should ask yourself why and should then scrutinize your reasons.

认为有问题的人，觉得这些例子都有问题的应该问自己为什么,然后仔细推敲自己的理由。

耶鲁公开课 - 心理学导论课程节选

And so these are situations where we would very much like to produce a vaccine, but we can't yet, and the question is 'Why? '.

我们十分想生产疫苗来解决这些问题,但我们还不行,你们会问,为什么会这样

耶鲁公开课 - 生物医学工程探索课程节选