| 单词 | periodic time |
| 释义 | > as lemmasperiodic time periodic time n. (a) Astronomy = period n. 7b; (b) Science = period n. 7e. ΘΚΠ the world > the universe > planet > primary planet > secondary planet, satellite > [noun] > time taken to perform orbit period1646 periodic time1715 time1764 1715 tr. D. Gregory Elements Astron. I. i. §84. 192 If the Sun were retained by the same Force [sc. gravity], propagated so far as itself, the Cubes of the Distances of the Sun and Moon..would have the same ratio as the Squares of their Periodic Times. 1862 W. Froude Rolling of Ships 75 All ships having the same ‘periodic time’, or period of natural roll, when artificially put in motion in still water, will go through the same series of movements. 1870 Nature 6 Oct. 461/1 The periodic time of a wave, its length.., and its speed of advance, are all related to each other by laws. 1977 Whitaker's Almanack 156/1 The squares of the periodic times vary as the cubes of the semi-major axes. < as lemmas |
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