Polar circles
| (Astron. & Geog.) | two circles, each at a distance from a pole of the earth equal to the obliquity of the ecliptic, or about 23° 28´, the northern called the arctic circle, and the southern the antarctic circle. |
See also: Polar
| 单词 | polar circles | ||
| 释义 | Polar circles
See also: Polar |
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