The essence of this method is a group of differential equations based on the average change rate of orbit elements, and the right sides of these equations contain definite integrals.
它的实质是以轨道要素的平均变化率为基础的微分方程，而方程的右端包含定积分。
The essence of this method is a group of differential equations based on the average change rate of orbit elements, and the right sides of these equations contain definite integrals.
它的实质是以轨道要素的平均变化率为基础的微分方程，而方程的右端包含定积分。
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