saturating speed

例句：

1. 1.The soil is at its saturating point.
   土壤已经达到了饱和状态。
2. 2. The water level in the lake has reached its saturating point.
   湖里的水位已经达到了饱和点。
3. 3.The oil saturates the ground quickly.
   油很快渗透到地面中。