the line on a mountain above which there is perpetual snow and ice
双语例句
用作名词 (n.)
In north China, there are lots of lovely animals living above the snow line. 在北国的雪线上有很多可爱的小动物。
This migration tends to stall near the snow line, where the gas headwind turns into a tailwind and provides an extra boost to the embryo's orbit. 这个迁移在接近雪线时会减缓下来，因为逆风气体在那附近将转成顺风，为胚胎轨道提供了额外的推力。
