vernal equinox

vernal-equinox的词性：
n.（名词）

1. The point at which the ecliptic intersects the celestial equator, the sun having a northerly motion.
春分点：黄道与天赤道相交的一点，太阳向北移动

2. The moment at which the sun passes through the vernal equinox, occurring on about March 21 in the Northern Hemisphere and marking the beginning of spring.
春分：太阳通过春分点的时刻，在北半球大约发生在三月二十一日并标志着春天的开始