It moves material from higher elevations to lower elevations where other eroding agents such as streams and glaciers can then pick up the material and move it to even lower elevations.
它將材料從較高的高度移動到較低的高度，其中其它侵蝕劑例如水流和冰川然後可以拾取材料並將其移動到甚至更低的高度。