Now I'm really fantastic at drawing this mechanical device, but you can imagine that dropping a weight can cause a paddle wheel to turn.

机械装置的时候，我真的很着迷，你可以想象，当重物掉落的时候会带动桨轮旋转。

youdao

Now I'm really fantastic at drawing this mechanical device, but you can imagine that dropping a weight can cause a paddle wheel to turn.

机械装置的时候，我真的很着迷，你可以想象，当重物掉落的时候会带动桨轮旋转。

youdao