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autumnal equinox

/ɔːˈtʌmnəl ˈiːkwɪnɒks/

翻译: 天文现象,约在9月22日或23日发生,标志着太阳从北向南穿过天赤道的时刻,此时昼夜时长几乎相等,在北半球标志着秋季的开始。

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/ɔːˈtʌmnəl ˈiːkwɪnɒks/C1formalscientific
  • zh天文现象,约在9月22日或23日发生,标志着太阳从北向南穿过天赤道的时刻,此时昼夜时长几乎相等,在北半球标志着秋季的开始。

An astronomical event that occurs around September 22nd or 23rd in the Northern Hemisphere, marking the moment when the Sun crosses the celestial equator from north to south, resulting in nearly equal lengths of day and night.

  1. Astronomical eventB2formal

    The moment when the sun crosses the celestial equator moving southward, marking the start of autumn in the Northern Hemisphere.

    zh秋分

    • The autumnal equinox usually occurs around September 22nd.
    • On the autumnal equinox, day and night are nearly equal in length.
    • Many cultures celebrate harvest festivals near the autumnal equinox.