He noticed that the time required for the fall was always the same, that the motion of a falling body does not depend on the mass.
他发现各种质量的下落时间总是相同的，也就是一个落体的运动与质量无关。
He noticed that the time required for the fall was always the same, that the motion of a falling body does not depend on the mass.
他发现各种质量的下落时间总是相同的，也就是一个落体的运动与质量无关。
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