Mnemosyne, whose name is spelled with some difficulty, is spelled on the lower part of your handout.

摩涅莫辛涅这个名字拼写起来有些困难，在你们讲义的下方可以找到。

耶鲁公开课 - 弥尔顿课程节选

Somehow, when I told you to invert the transformation, some of you had some difficulty.

我上次让你们逆推变换公式的时候,有的同学觉得很困难

耶鲁公开课 - 基础物理课程节选

I told you, the way I'm going to teach any subject is going to start with the easiest example and lull you into some kind of security and then slowly increase the difficulty.

我之前讲过,我在上每一门课的时候,都是从最简单的例子开始,先打消你们的顾虑,然后渐渐加深难度

耶鲁公开课 - 基础物理课程节选