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

You know, even some goes pass you on the street and you don't smile ostensibly you don't smile-- there are certain micro-muscles in your face that are moving that actually make you feel better.

即使路人与你擦身而过时，你没笑,表面上你没有笑-,但你面部的细微肌肉,会收缩，让你感觉更好。

哈佛公开课 - 幸福课课程节选

It's not either pushing or not pushing.

你的感觉并不会是有压力或者没有压力

耶鲁公开课 - 心理学导论课程节选

Then, a drops out and you weigh your normal self.

此时就没有 a 了,你又感觉体重正常

耶鲁公开课 - 基础物理课程节选

So, there's a whole lot of sensory organs, for instance, focused along your tongue, and that's why that's so big, and an enormous amount on your face but your shoulder isn't even— doesn't even make it on there because although your shoulder might be bigger than your tongue, there's not much going on.

比如,在你的舌头上,集中存在着非常多的感觉器官,也就是这片区域如此之大的原因,你的脸上也有数量庞大的感觉器官,但你的肩膀并没有,你的肩膀甚至都没有在示意图中标示出来,因为,尽管你的肩膀要比你的舌头更大,但却并没有什么感受器官

耶鲁公开课 - 心理学导论课程节选