And in these experiments we not only need to learn what has been learnt, but also have to learn what it is that we don't know.

在这些试验里我们不仅,要知道已知的知识，还要知道,我们不知道的内容。

麻省理工公开课 - 媒体、教育、市场课程节选

Someone of you may know that there's been experiments in which, for one reason or the other, the two halves of the brain have been separated.

你们中可能有人知道,有些实验曾经，出于某种实验目的，将大脑分为两部分。

耶鲁公开课 - 死亡课程节选