表土层 [土壤] surface soil layer
epipedon
- 随着植被覆盖面的消失,每次雨季都将更多的宝贵的表土层冲到湖里去。
With the tree cover gone, every rainy season sees more of the precious topsoil washed away into the lake. - 封场覆盖系统是垃圾卫生填埋场建设的重要组成部分,覆盖系统包括气体导排层、土工膜、排水层、植被表土层。
Closure cover system is one of important parts of landfill site construction, it includes landfill gas discharge guiding layer, geotechnical film, drainage layer and plant cover surface soil layer. - 保护地表土层对于保护草地资源和生态环境,以及沙漠化防治具有极端重要性。
The protection of top soil layer has utter most importance in protection of grassland resources and ecosystem, and in prevention of sandy desertification.