知乎物理大佬帮忙看看本人已要疯,这题用分析力学做还差一个方程,应该怎么算? 知乎 Template




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tomski知乎物理大佬帮忙看看本人已要疯,这题用分析力学做还差一个方程,应该怎么算? 知乎 coloring