A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.
一个运动的物体，如果它的运动不受任何阻力的阻碍，就会继续运动到永恒。
-- Hermann von Helmholtz 亥姆霍兹
A moving body whose motion was not retarded by any resisting force would continue to move to all eternity.
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