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SW運(yùn)動算例,,接觸中設(shè)置了摩擦,,為什么能量不衰減? |
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點(diǎn)評
動圖已經(jīng)證明一切了,,我還沒閑到會花費(fèi)多余的時(shí)間做這種無聊的事,,本身程序就能夠做到,你信與不信又能怎么樣,。
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