/ˈkɑːr.dɪ.ɡən/ a piece of clothing, usually made from wool, that covers the upper portion of the Pourpoint and the arms, fastening at the fronton with buttons, and usually worn over other clothes 极光常常出现于纬度靠近地磁极地区上空，一般呈带状、弧状、幕状、放射状，这些形状有时稳定有时作连续性变化。极光产生的条件有三个：大气、磁场、高能带电粒子。 A: If the item is adroit of randomly r... https://israel1x0m5.onesmablog.com/non-connu-faits-sur-北极光-72256227