I imagine that you all have images of Robert Frost and actual images in your mind when you think of this poet.

我觉得你们对弗罗斯特都有一定的印象,当想到这个诗人的时候脑海就会浮现他的图像。

耶鲁公开课 - 现代诗歌课程节选

Then in your mind, without realizing it, you found the trajectory at all future times.

在你脑海里,你会下意识地,想像出它之后的抛射轨迹

耶鲁公开课 - 基础物理课程节选

All right now, now what I'd like you to do is just sort of do a guestimate in your mind of the percentage errors you might have made overall in these estimates, and I'll come back and ask you in a minute.

好了,现在,现在我希望你们,在脑海中估算下你们预测的百分误差,你们可以就总值做一个估算,我会在一分钟后问你们

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选