漢德百科全書 | 汉德百科全书
Chinese — German
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Alaska-AK
Denmark
Finland
Iceland
Canada
Northwest Territories-NT
Norwegen
Nunavut-NU
Russia
Sweden
United States
Yukon-YT
Polarkreis/Arctic Circle
极圈是南北纬66.5度的纬线,其纬度是黄赤交角的余角。因纬度甚高,接收太阳辐射量不足,终年寒冷、白雪覆盖。
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3 years ago
2 years ago