| 单词 | mean solar day |
| 释义 | > as lemmasmean solar day mean solar day n. Astronomy the apparent solar day averaged over a tropical year, measured as the interval between successive transits across a given meridian of the mean sun. ΚΠ 1810 J. Greig Astrography iii. 43 A mean solar day, is the time shewn by a well going time piece, and consists always of 24 hours. 1863 R. Main Pract. & Spherical Astron. v. 99 Measured in mean solar days.., the length of the tropical year is 365.24222 days. 1935 A. H. G. Palmer & K. S. Snell Mechanics ii. 14 The unit generally chosen for scientific purposes is the mean solar second, or 1/86400 of the mean solar day. 1991 C. Mansall Discover Astrol. iv. 55/2 There is a difference in time between the sidereal day and the mean solar day of 3 minutes 56 seconds. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。