柯林斯詞典snow line 1. N the altitudinal or latitudinal limit of permanent snow 雪線 返回 snow line劍橋詞典?the snow line the level on a mountain above which snow is found for most or all of the year 雪線（高山上終年積雪的最低界線） above/below the snow line 雪線以上／以下 返回 snow line