单词 | autumn equinox |
释义 | autumn equinox(also autumnal equinox) noun 1The equinox in autumn, on about 22 September in the northern hemisphere and 20 March in the southern hemisphere.Sunlight is continuous throughout the summer, but after the solstice the sun slowly sinks to the horizon until it drops below on the autumn equinox....
1.1 Astronomy The equinox in September.The vernal and autumnal equinoxes occur when the ecliptic crosses the celestial equator, so linking stars, sun and earth through the passage of time. |
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