| 单词 | vernal equinox |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔celestial longitude〕The angular distance eastward from the vernal equinox to the great circle drawn through the pole of the ecliptic and a celestial body.黄经：向东从春分至通过黄经极及一个天体所画的大圆圈之间的角距离美国传统In the northern hemisphere, the vernal equinox occurs on about March 21--in the southern hemisphere it is on about September 23.春分在北半球是在3月21日，在南半球是9月23日。剑桥国际The vernal equinox is the time in the spring when the sun crosses the equator, and when night and day are of equal length.春分剑桥国际 |
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