tropical year造句

例句与造句

1. During a tropical year the sun moves from vernal equinox to vernal equinox .
   在一个回归年内，太阳从春分点转回到春分点。
2. The tropical year is the interval between two transits of the mean sun through the mean equinox .
   回归年是平太阳两次通过平春分点的时间间隔。
3. It's difficult to find tropical year in a sentence. 用tropical year造句挺难的