Next, if you're going to sleep, I ask you to sit between two non-sleepers because sometimes what happens, the whole row will topple over.

另外,如果你要睡觉的话,请坐在两个不睡觉的同学中间,因为有时候,整排的人都倒下了

耶鲁公开课 - 基础物理课程节选

Why didn't the guys in the middle get crushed?

为什么中间的几排人没给压扁呢

耶鲁公开课 - 古希腊历史简介课程节选