Objects falling freely in a vacuum have the same rate of speed regardless of differences in size and weight.

重量不同、大小不同的物体在真空状态自由降落时速度一样。

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Objects falling freely in a vacuum have the same rate of speed regardless of differences in size and weight.

重量不同、大小不同的物体在真空状态自由降落时速度一样。

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