- The scratch does not penetrate the coating layer to Die.
刮伤没有穿透保护层。
- The ozone layer is a protective layer around the planet Earth.
臭氧层是地球的保护层。
- 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。
- 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。
