active permafrost

• 活动永冻土

active permafrost的用法和样例：

例句

1. The northerly site was chosen for its lack of tectonic activity and its permafrost.
   挪威之所以会选择在这里建设种子库，是因为这一地区地质活动较少，而且处于永冻土地带。
2. The Himalayan cryosphere such as glaciers and permafrost is very important in water circulation in the area.
   喜玛拉雅的冰冻圈，如冰川和永冻土在该区域的水循环中非常重要。