College can be stressful. Sometimes doing nothing at all is just what a student needs after studying for final exams.

VOA: special.2010.06.18

He seems to have been doing nothing but reading, acquiring more knowledge and really essentially just learning for the sake of learning.

他好像除了读书，掌握更多的知识以及,单纯学习之外什么也不做。

耶鲁公开课 - 弥尔顿课程节选

It's very clear you don't need a force if something is doing nothing, just sitting there.

显而易见,如果物体没有运动,只是静止状态,那是不需要力的

耶鲁公开课 - 基础物理课程节选

But what I'm doing, it's just math, there's nothing interesting going on.

刚才的只不过是无聊的数学运算

耶鲁公开课 - 博弈论课程节选