的确，笑在医学，体育，哲学，精神，健康以及各个方面，都是禁得住考验的，这样一件好的事情，我们为什么不做呢？

Indeed, the laughter in medicine, sports, philosophy, spirit, as well as all aspects of health, be able to endure all the tests, so that a good thing after all, why not?

youdao

那为什么我们不做更多的很棒的工作呢？

So why aren't we doing more Great Work?

youdao

我们为什么不做一个呢？

Why don't we make one?

youdao

So why don't we go to a clicker question here, and see if you can tell us this.

为什么我们不做,一个课题表决题呢，来看看你们是否能回答我。

麻省理工公开课 - 化学原理课程节选