You might think that its function is to make you more - a better cyclist but that's not its only function.

你也许只知道它的作用是--,使你成为一个更好的自行车手,但这并不是它的唯一功能

耶鲁公开课 - 生物医学工程探索课程节选

Now, I tie this one kilogram mass to it and let it go.

现在,我把这个 1 千克重的物体系上,并松开手

耶鲁公开课 - 基础物理课程节选