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mean solar day

/miːn ˈsəʊlə deɪ/

翻译: 平太阳日,指以太阳视运动为基准的平均一日长度,即太阳连续两次经过同一子午线所需的平均时间。它是民用计时中标准的24小时时间单位,称为平太阳日。

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phrase

/miːn ˈsəʊlə deɪ/C1formalscientific
  • zh平太阳日,指以太阳视运动为基准的平均一日长度,即太阳连续两次经过同一子午线所需的平均时间。它是民用计时中标准的24小时时间单位,称为平太阳日。

The average length of a day based on the Sun's apparent motion across the sky, used as the standard 24-hour time unit for civil timekeeping.

  1. Average length of a dayC1formal

    The average time it takes for the Earth to complete one rotation relative to the Sun, equal to 24 hours.

    zh平太阳日

    • The mean solar day is divided into 24 hours of equal length.
    • Astronomers use the mean solar day to standardize timekeeping.
    • The length of a mean solar day is slightly longer than a sidereal day.