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vernal equinox

/ˈvɜːrnəl ˈiːkwɪnɒks/

翻译: 太阳沿黄道自南向北经过天赤道的天文事件,通常发生在每年3月20日左右,标志着北半球春季的开始,这一天全球昼夜几乎等长。

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/ˈvɜːrnəl ˈiːkwɪnɒks/C1formalscientific
  • zh太阳沿黄道自南向北经过天赤道的天文事件,通常发生在每年3月20日左右,标志着北半球春季的开始,这一天全球昼夜几乎等长。

The astronomical event that occurs around March 20th each year when the Sun crosses the celestial equator from south to north, marking the beginning of spring in the Northern Hemisphere and equal length of day and night.

  1. Astronomical eventB2formal

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

    zh春分

    • The vernal equinox usually occurs around March 20th.
    • Many cultures celebrate the vernal equinox as a time of renewal.
    • The vernal equinox signals the beginning of longer days.