But, you know why not do something a little special, little different, and they decided instead to use lithium.

但是你懂的，为什么不做的更特殊，更与众不同一些呢？

麻省理工公开课 - 化学原理课程节选

Usually when you know why it's not working, it's obvious what you have to do to make it work.

通常你明白了出错的原因后，很明显你必须让程序正常运行起来。

麻省理工公开课 - 计算机科学及编程导论课程节选

So, the radical idea here is you might not know what--why you do what you do and this is something we accept for things like visual perception.

由此引出的一个偏激的观点,你根本不知道自己为何要这么去做,这有点像我们获得视觉感知的过程。

耶鲁公开课 - 心理学导论课程节选