若有个疯狂物体，我无法提供给你们，我给你们的将是方形，或者圆盘形的物体，但它必须是薄盘子。
If you have some kind of a crazy object; which of course we will never give you; we'll always give you a square or we'll give you a disk But it has to be a thin plate.
实际上，在所有实验中，这两个长方形物体移动的速度都相同。
In fact, in all cases, the two rectangles travelled at the same speed.
实际上，在所有实验中，这两个长方形物体移动的速度都相同。
In fact, in all cases, the two rectangles travelled at the same speed.
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