adj.靠近北极的；亚北极的
n.亚北极区
Lemmings, small rodents of the arctic and subarctic regions of the Northern Hemisphere, have long been a byword for mass mindlessness and mass suicide. 旅鼠是一种生活在北半球北极区和亚北极区的小型啮齿类动物，一直以来人们流传着很多关于他们愚笨和自杀的笑话。
