英语词汇“mean solar day”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	mean solar day
释义	mean solar day noun Astronomy The time between successive passages of the mean sun across the meridian.It no longer made sense to define the second as 1 / 86,400th of a mean solar day.... The second was defined to be 1 / 86,400 of the mean solar day, the average rotational period of the earth with respect to the Sun.
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