所以我们一直在讨论营养，环境中的元素对于生物体的发展，健康的生活和繁殖是必不可少的。

So we've been talking about nutrients, the elements in the environment that are essential for living organisms to develop, live a healthy life, and reproduce.

youdao

所以，当我们看到的物体如咖啡杯原来还在那个位置，一旦转过头来再看时，它又跑到了另一个位置去了。

So, by the time we perceive an object like the coffee cup in one location, it will have already changed location as we move toward it.

youdao

所以这些是物体上，仅存的作用力。

So these are the only forces that act on this object.

youdao

So, a massless body cannot have a net force on it, because the acceleration of the rope cannot be infinite.

所以没有质量的物体不会受到力,因为绳子的加速度不可能是无穷大

耶鲁公开课 - 基础物理课程节选

Again, your common sense tells you, "Look, you are pulling something whose effective mass seems to be 5, the answer is 2."

你的常识会又一次告诉你,"你在拉一个相当于 5 千克的物体,所以加速度是 2 "

耶鲁公开课 - 基础物理课程节选

So van Inwagen concludes, if you have an object, and you take it apart, and then put them all back together again, you don't have the very same object that you started out with.

所以范·，因瓦根总结道，如果你将拥有的物体拆开，再把所有的零件重组，你手上的并非,原来的那个物体。

耶鲁公开课 - 死亡课程节选