| 释义 |
snow linen.（名词）- The lower altitudinal boundary of a snow-covered area, especially of one that is perennially covered, such as the snowcap of a mountain.雪线：冰雪覆盖地的较低高度分界线，特别是长年积雪地区，如覆有积雪的山顶
- The fluctuating latitudinal boundaries around the polar regions marking the extent of snow cover.万年雪线：在两极地区标志着雪盖波动范围的纬度边界
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