我们刚刚讨论了描述质子，和电子之间相互作用力的定律，当距离变为无穷时，力变为零，那当距离变为，零时会发生什么？

So, we just talked about the force law to describe the interaction between a proton and an electron. You told me that when the distance went to infinity, the force went to zero.

youdao

好了！刚刚发生什么事了？

Ok! What just happened?

youdao

So now thankfully I found the lightest one which happens to be this guy here and so what's just happened?

现在我找出了最轻的，它就是,这个杯子，那么刚刚发生了什么呢？

哈佛公开课 - 计算机科学课程节选