开普勒第二定律当然也对，如果东西远离了。

But, Kepler's law would also be true, actually, if things were going away.

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因此我想告诉你们，一些关于开普勒第二定律的知识。

So, I want to tell you a bit about Kepler's second law of celestial mechanics.

youdao

开普勒第二定律指行星的轨道速度与其和太阳的距离。

Kepler's second law means that a planet's orbital speed changes with its distance from the sun.

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