And who, where would--If it was, if it was converted into a weapon, where would the vaccines to protect the rest of the country come from?

如果天花被转化成生化武器,去哪里才能找来保护国家的疫苗呢

耶鲁公开课 - 生物医学工程探索课程节选

But we all know that the reason things come to a halt when you push them is, there eventually is some friction or drag or something bringing them to rest.

但我们都知道,推完之后会停下来的原因就是,最后还是有某种摩擦或者拖拽,或者别的什么使得物体静止下来

耶鲁公开课 - 基础物理课程节选