/ˈkɑːr.dɪ.ɡən/ a piece of clothing, usually made from wool, that covers the upper portion of the body and the arms, fastening at the ligne with buttons, and usually worn over other clothes接下来，我们就来从各个方面科普北极光的相关知识与背景文化，并简单介绍观测极光的最佳季节与地点，带你走出在