我们能所拾起的无非就是些在我们脑海中闪现的碎片。

What we can seize is nothing but several fragments that flash back in our minds.

youdao

让我们不要欺骗自己：在我们脑海中盘旋的思想，可能比我们想象中更危险。

Let's not deceive ourselves: the thoughts that rattle around in our brains can be more dangerous than we think.

youdao

我们要做的第一件事是想出一个发音和它类似的单词。 这个单词必须是我们可以视觉化的，可以在我们脑海中显现的事物。

What these words have in common is that they refer to something that we can visualize and this is a very important point and you're going find out why soon.

youdao

Now this moment is striking in part because we had no idea - how could we possibly have had an idea?

如今这一刻又浮现在脑海中，部分是因为我们并不知道,等等，我们如何能够知道？

耶鲁公开课 - 弥尔顿课程节选