But where there are no trees, the rain falls on hard ground and flows away on the surface, and this causes floods and the rain carries away the rich topsoil in which crops grow.

• 但是没有树木的地方，雨水下在硬梆梆的土地上，然后在地面流走，这会造成洪水，并把庄稼赖以生存的肥沃的表土层冲走。