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单词 lunar day
释义

lunar day

noun

1
: the rotation period of the moon on its axis equal to the sidereal month of about 27¹/₃ days
2
: the interval of about 24 hours and 50 minutes of sidereal time between successive transits of the moon across the meridian of any fixed observer
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更新时间:2026/6/10 18:49:28