秋分的英文：
the Autumnal Equinox

参考例句：

the autumnal equinox
秋分,秋分点

The Autumnal Equinox is the best time for wheat-sowing.
秋分种麦最相宜。

equinoctial gales
春分[秋分]时的暴风雨

the autumnal [ vernal ] equinoctial point
秋分[春分]点

autumnal是什么意思：
adj. 秋的，秋天的，秋季的

In its autumn tint of gold.
从它金色，如秋天一般的色彩。

It is bright and fresh in early autumn.
初秋的天气格外明朗清新。

Autumn is the best season for travelling.
秋天是最适合旅行的季节。

There is a breath of autumn in the air today.
今天的天气已露出了一丝秋天的气息。

Yes, autumn is bewitching!
哦! 好一派迷人的秋色啊!

equinox是什么意思：
n. 昼夜平分点，春分或秋分

The autumnal equinox is the point in the opposite direction of the vernal equinox.
与春分点相隔180°的另一点，就是秋分点。

The Autumnal Equinox is the best time for wheat-sowing.
秋分种麦最相宜。

The other point of intersection of equator and the ecliptic is called the Autumnal Equinox
赤道和黄道的另一个相交点叫作秋分点。

The other point of intersection of equator and the ecliptic is called the Autumnal Equinox.
赤道和黄道的另一个相交点叫作秋分点。

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。