covering flux

• 覆盖层

covering flux的用法和样例：

例句

1. For fish,water constantly sweeps away dirt from the covering.
   对鱼来说，流水不断地把污垢从它的眼睛的覆盖层上带走。
2. The surface is the relatively thin covering of soil and unconsolidated rock waste.
   浮土是由土壤和未固结岩屑组成的比较薄的覆盖层。