| 单词 | polar circle |
| 释义 | > as lemmaspolar circle polar circle n. a circle parallel to the equator, at a distance from either pole equal to the greatest declination of the ecliptic.extracted from circlen.polar circle polar circle n. either of the Arctic and Antarctic circles. ΘΚΠ the world > the earth > geodetic references > [noun] > latitude > polar circle Arctic Circlec1540 polar circle1556 Antarctic Circle1587 polar line1658 polar1688 the world > the universe > celestial sphere > circle of celestial sphere > [noun] > lesser circle > polar circle polar circle1556 1556 R. Record Castle of Knowl. 41 Recken from one of the poles..23 degrees and an halfe,..draw a circle of that circuit about eche Pole... These circles maye well bee called Pole circles, or Polar circles. 1665 T. Herbert Some Years Trav. (new ed.) 5 These sorts of people freeze within the polar circles,..the Pole being their vertex, and the Æquator..their direct Horizon. 1776 E. Gibbon Decline & Fall I. x. 246 When his invincible Goths, armed with martial fanaticism, should issue in numerous swarms from the neighbourhood of the Polar circle, to chastise the oppressors of mankind. 1859 C. Darwin Origin of Species xi. 362 If we look at a globe, we shall see that under the Polar Circle there is almost continuous land from western Europe..to eastern America. 1977 A. Hallam Planet Earth 36/2 In between the Tropics and the polar circles are 43° of latitude in which the Sun is never vertically overhead. < as lemmas |
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