其物理意义，开普勒方程是关于行星运动微分方程组的一个积分，由于引入了辅助量E，使数学表达式大为简化。

It also has its physical significance. Kepler equation is an integral of differential equation set. The introduction of assistant quantity E leads to the simplification of mathematic expression.

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By putting the two together, out comes the elliptical motion of the planets.

将这两个式子联立,就得到了行星作椭圆运动的方程

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