| 单词 | apparent time |
| 释义 | > as lemmasapparent time apparent time n. (also apparent solar time) see quot. 1940. ΘΚΠ the world > time > reckoning of time > [noun] > systems of reckoning time of day time1646 apparent time1694 local timea1703 Greenwich Mean Time1782 sun time1837 GMT1840 railway time1847 railroad time1849 Greenwich time1861 Eastern time1878 Pacific time1880 Universal Time1882 Eastern Standard Time1883 Mountain time1883 British Standard Time1908 daylight saving1908 zone time1908 LMT1909 British Summer Time1916 summertime1916 U.T.1929 B.S.T.1930 EST1935 British Double Summer Time1941 war time1942 B.D.S.T.1943 ephemeris time1950 1694 J. Smith Horol. Disquis. 30 Now the Clock being still naturally inclined to lose, I therefore..set him again..so he is again too fast for the sun 3′ 45″ (which is the most I suffer him to differ from the apparent Time). 1706 Phillips's New World of Words (new ed.) (at cited word) Relative, Apparent, or Vulgar Time, is the sensible and outward Measure of any Duration or Continuance estimated by Motion; and this is commonly us'd instead of true Time. 1765 N. Maskelyne in Philos. Trans. 1764 (Royal Soc.) 54 344 There are three different kinds of time used by astronomers, sidereal time, apparent solar time, and mean solar time. 1834 Nat. Philos. (Libr. Useful Knowl.) III. Math. Geogr. v. 16/1 A common sun-dial shows the hour of apparent time. Time-keepers or chronometers, common watches and clocks, are made to show the hour of mean time. 1922 H. S. Jones Gen. Astron. 48 If the sun is used as a reference body the time so determined is called apparent solar time. 1940 Chambers's Techn. Dict. 45/1 Apparent solar time, the hour angle, at any moment, of the true, or apparent, sun as distinguished from the mean sun... Sundials read apparent solar time. 1942 F. Debenham Astrographics (ed. 2) 20 The shadow of the real sun will only give us the irregular real sun time (called Apparent Time), so we have to add or subtract the Equation of Time to get Mean Time. < as lemmas |
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