The solar equation table of the Dayan Calendar is a mathematical table of equally quartic difference, and it reflects Yi Xing's profound understanding about the solar motion.
《大衍历》日躔表是一份四次差分相等的数表，反映一行对太阳运动复杂性的深刻认识。
The reverse time of the crest motion depends on the smallest zenith Angle and on solar cycle.
运动的反向时间随太阳的最小天顶角的大小而变化，随太阳活动而变化。
In this paper, the problem on the stable region of the motion of P-type retrograde minor bodies in the solar system is discussed.
本文讨论了太阳系P型逆行小天体运动的稳定区域问题。
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