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北極圈 北极圈
  bei3 ji2 juan4
  1.942 K 2 years ago 2 days ago
  First author
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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  Author inspector@yizuo-media.com
3 years ago 2 years ago
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