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牛顿力学诞生以前，人们是如何计算弹道的？ - 知乎
source link: https://www.zhihu.com/question/318213534/answer/637854978
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这个问题提的很好，通过对这个问题的回答，可以让大家明确几点：在牛顿力学之前，已经有了对重力加速度的…
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