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速度

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出自维基百科，自由个百科全书

速度是描述物体运动快慢搭方向个物理量。物体拉一段辰光Delta t内个平均速度 v是渠拉箇段辰光里个位移Delta搭辰光间隔之比。

取自“https://wuu.wikipedia.org/w/index.php?title=速度&oldid=242325”
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