| 单词 | mean sun |
| 例句 | Astronomical time, either apparent or mean, is the hour angle of the true or mean sun respectively, measured to the westward throughout its entire daily circuit. Lectures in Navigation In the present case, where we are concerned with mean time, mid-day means the instant of mean noon, or of the passage of the mean sun over the meridian. International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings Sun time of the mean sun at Greenwich is given for every minute of the day in the year 1919 in the pages from 6 to 30. Lectures in Navigation |
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