Rain washes away loosesoil and penetrates cracks in the rocks.
雨水冲走了松散的土壤，穿透了岩石的裂缝。
2
In some cases, the loosesoil is blown completely away, leaving a stony surface.
在某些情况下，松散的土壤全部被风吹走，只剩下石质化的表层。
3
In contrast, the roots of grasses and other small plants may help to hold loosesoil fragments together, thereby helping to prevent erosion by the wind.