开普勒第三定律给出了一个关于力的本质的更为具体的说明。
Kepler's third law gave a more specific hint about the nature of the force.
让我们比较天王星和地球的轨道，来检验一下开普勒第三定律。
Let us test Kepler's third law for the orbit of Uranus compared with that of earth.
开普勒第三定律，也即调和定律，清楚地表明了行星公转周期与其离日距离之间的关系。
The third one, the law of periods, allows us to establish a clear relationship between a planet's orbital period and its distance from the sun.
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