Mathematically, it's done by taking the expression for R and differentiating everything in sight that can be differentiated as vector t.

从数学上看是这样的,写出 R 的表达式,并对所有可以进行矢量微分的部分,对时间 t 求微商

耶鲁公开课 - 基础物理课程节选

Why isn't sight like touch, diffused through all parts of the body "that she might look at will through every pore?"

为什么视力不能像触觉那样遍布人体各个部位,那样“她就能看到身体的每个毛孔“

耶鲁公开课 - 弥尔顿课程节选

And to start with some real examples, a lot of this infant research has gone back to the Piagetian question of object permanence, asking, "Is it really true babies don't know that objects remain even when they're out of sight?"

下面给大家介绍一些实例,许多的婴儿研究都回到了,皮亚杰的客体永存性问题上,去探讨,"婴儿是否真的不知道,物体即使离开视线也仍然是存在的"

耶鲁公开课 - 心理学导论课程节选

God's extremely peculiar configuration of the human body You read this and you realize that Samson is really on to something here Why didn't, we ask with Samson God implant the sense of sight in human beings just as he implanted the sense of touch or feeling?

还有上帝对人体极其古怪的构造,读这些你们就能意识到参孙在这确实知道一些意图,我们和参孙一样也想问,为什么上帝不让人类拥有视觉,就像让人类当初拥有触觉一样？

耶鲁公开课 - 弥尔顿课程节选