| 单词 | mean time |
| 释义 | > as lemmasmean time mean time n. [compare French temps moyen (1740)] = mean solar time n.; cf. Greenwich Mean Time n. at Greenwich n. 1c. ΚΠ 1751 Chambers's Cycl. (ed. 7) at Equate To Equate solar days, that is to convert apparent into mean time, and mean into apparent 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. 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. 1992 Apollo June 404/3 Daniel Quare..made the long-case clock on view which shows both mean time and solar time and has two separate but interlinked dials. < as lemmas |
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