| 释义 |
mean sunn.（名词）- A hypothetical sun defined as moving at a uniform rate along the celestial equator at the mean speed with which the real sun apparently moves along the ecliptic, used in computing the mean solar day.平太阳：假定以统一速度沿天赤道运行的假想太阳，真实太阳以平均速沿黄道运行，用于计算平太阳日
|