在最后一个场景中长方体从桌子上掉下来了，显示后面没有球了。

In the last scene, the rectangle dropped off, revealing no ball behind it.

youdao

在最后一个场景中长方体从桌子上掉下来了，显示后面没有球了。

In the last scene, the rectangle dropped off, revealing no ball behind it.

youdao