只要有一块橡皮泥、一枚宽头钉和一枚窄头钉，你很容易就能看到这一原理是如何运作的。

You can easily see how this works with a piece of modeling clay, a nail with a wide head, and a nail with a small head.

youdao

只要有一块橡皮泥、一枚宽头钉和一枚窄头钉，你很容易就能看到这一原理是如何运作的。

You can easily see how this works with a piece of modeling clay, a nail with a wide head, and a nail with a small head.

youdao