平春分点

píng chūn fēn diǎn
  • mean equinox
平春分点平春分点
平春分点[píng chūn fēn diǎn]
  1. 回归年是平太阳两次通过平春分点的时间间隔。

    The tropical year is the interval between two transits of the mean Sun through the mean Equinox .