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单词 mean sun
释义 mean sunn.(名词)
  1. 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
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更新时间:2025/4/13 21:27:59