你有绳子吗？

Do you have any string?

youdao

你能跳过这根绳子吗？

Can you jump over this rope?

youdao

不要放开绳子，否则你会摔下去。

Don't hang off the rope, or you will fall down.

youdao

So you can imagine a bead with a wire going through it and the bead can only slide back and forth.

你可以想象一个穿在绳子上的珠子,小珠只能前后滑动

耶鲁公开课 - 基础物理课程节选

Either a rope is pulling, a rope is pushing it, you are pushing it, you are pulling it.

无论绳子是在拉你还是推你,无论你是在推物体还是拉物体

耶鲁公开课 - 基础物理课程节选

What makes up a rope? Of course you know, ropes are basically bundles of fibers, very same fibers that have been woven together in a certain way.

绳子是由什么构成的？，你肯定知道，是由一束束纤维构成，是由一样的纤维按某种方式编织,在一起构成。

耶鲁公开课 - 死亡课程节选