Beyond a modest distance you don't feel the electron-electron repulsion.

在一个适中的距离,你感觉不到电子之间的排斥力。

麻省理工公开课 - 固态化学导论课程节选

So when we say, he says invisible things can't be destroyed, he means the things that you can't see or touch or hear or feel, whatever it is, see, touch, smell, taste.

所以当我们说，他说无形的东西不可毁灭，他的意思是你看不见摸不着,听不见也感觉不到的东西，看，摸，问，尝所有这些。

耶鲁公开课 - 死亡课程节选

You don't feel any weight because your weight is the opposition you get to falling through the floor; but if the floor is giving way and you're just falling freely, you feel weightless.

你不会感到重力,是因为你的重力在阻碍你穿过地板,如果没有地板,你自由下落,也感觉不到重力

耶鲁公开课 - 基础物理课程节选