You wrap a rope around a pole, or around a rod, and you use the friction between the rope and that rod to your advantage, and it works as follows.
把一段绳子绕在柱上,或绕在棒子上,可以利用绳子,和柱子间的摩擦力,达到我们想要的,它是如此运作的。
We wrap the rope around three times.
把绳子绕三圈。
If the object is vertical and smooth, and there is danger of the rope slipping, take an extra wrap around the object.
如果该物体是垂直且光滑的,有缰绳滑落的危险,就加用绳来包裹住物体。
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