active permafrost的用法和樣例：
例句
- The northerly site was chosen for its lack of tectonic activity and its permafrost.
挪威之所以會(huì )選擇在這里建設種子庫，是因為這一地區地質(zhì)活動(dòng)較少，而且處于永凍土地帶。 - The Himalayan cryosphere such as glaciers and permafrost is very important in water circulation in the area.
喜瑪拉雅的冰凍圈，如冰川和永凍土在該區域的水循環(huán)中非常重要。
