冰川移动会侵蚀山地（冰川移动通常会导致出现角峰和冰斗谷），但是最冷的冰川被冻得固定在某个地方，就会保护山脉并且还会让它们“长高”。
Moving glaciers can cause erosion on mountains, but the coldest glaciers, frozen in place, protect mountains and allow them to grow taller. Cynthia Graber reports.
结果表明：人口压力、农业压力、森林资源破坏和薪柴重负是导致高原山地土壤侵蚀的典型相关因子。
The results show that the population growth, farming, forest degradation and fuel wood cutting are the canonical factors causing the soil erosion in the plateau mountains.
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