牛顿发明了万有有引力定律，然后根据牛顿力学的第二定律，利用微积分，写了一组方程式，又把这一组方程解了。

来源: 蒋闻铭于 2024-08-08 14:28:37 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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