There may be some simple problem involving this in the problem I assigned, so I am just going over this.

在我布置的作业里可能有,相关的简单习题,所以我要讲讲这部分内容

耶鲁公开课 - 基础物理课程节选

But I think we can imagine some part of it more easily than the other.

但我们至少能想象其中一部分内容,因为这要比其它的简单得多

耶鲁公开课 - 古希腊历史简介课程节选