/ˈkɑːr.dɪ.ɡən/ a piece of clothing, usually made from wool, that covers the upper part of the Pourpoint and the arms, fastening at the fronton with buttons, and usually worn over other clothes 克里斯蒂安·伯克兰根据前人已留意到的极光与电磁现象的联系，通过大量电磁学实验模拟，指出极光是太阳向地球抛射带电粒子流所引起的。但限于当时的技术水平限制，他无法获得来自外层空间的探测数据以直接验证... https://trevor4s2j6.blog2news.com/32312650/北极光-un-aperçu