《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 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.
应当卯能了随时告行，加做社会需衍知干作。
They should have the ability to change at any time, to do the work that the society needs.
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