adj.靠近北極的；亞北極的
n.亞北極區(qū)
Lemmings, small rodents of the arctic and subarctic regions of the Northern Hemisphere, have long been a byword for mass mindlessness and mass suicide. 旅鼠是一種生活在北半球北極區(qū)和亞北極區(qū)的小型嚙齒類動(dòng)物，一直以來人們流傳著很多關(guān)于他們愚笨和自殺的笑話。
