topsoil
topsoil
英[ˈtɒpsɔɪl]美[ˈtɑpsɔɪl]
n.表土（层），耕作（层），耕层；
例句
This causes environmental damage when the topsoil is washed away by the rains.雨水冲走表层土壤会造成环境破坏。
The topsoil has been almost completely washed away.表层土壤已差不多完全给冲走了.
The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.屯留煤矿副井井筒表土段采用普通法施工,利用井外降水井疏干降水.
A thin layer of topsoil was swept away.薄薄的一层表土被冲走了。
英语四级真题
What about supply? The three environmental trends—the shortage of fresh water, the loss of topsoil and the rising temperatures—are making it increasingly hard to expand the world's grain supply fast enough to keep up with demand.
出自-2016年6月阅读原文The three environmental trends—the shortage of fresh water, the loss of topsoil and the rising temperatures—are making it increasingly hard to expand the world's grain supply fast enough to keep up with demand.
2016年6月四级真题（第一套）阅读 Section B柯林斯高阶英汉双解学习词典释义
N-UNCOUNT
表土（层）
Topsoil is the layer of soil nearest the surface of the ground.
英汉词典释义
n.
表土(层);耕作(层)
The topsoil has been almost completely washed away.表层土壤已差不多完全给冲走了。英英词典释义
Noun
1. the layer of soil on the surface
行业词典
公路科技： 表土；
生态学： 表土；土壤剖面中*靠近地表的一个层次（A层），该层土壤富含腐殖质，一般厚度20～30cm，黑土和黑钙土的A层厚度可达50～100cm。；
