topsoil

第三人称单数：

动词第三人称单数: topsoils

更多词形：

动词过去式: topsoiled | 动词过去分词: topsoiled | 动词现在分词: topsoiling | 动词第三人称单数: topsoils |

单词例句：

On average, the planet has little more than 3 feet of topsoil spread over its surface.

平均情况下，覆盖着地球的表土层的厚度小于3英尺。

By protecting the topsoil and reducing fertilizer use, conservation agriculture can help in the fight against global warming.

等一下,还有呢!通过保护表层土和减少化肥施用量,保护性农业能够在与全球变暖的斗争中发挥作用。

Loss of topsoil by erosion and a reduction in soil fertility by not replacing nutrients, turn a renewable resource into a non-renewable one.

侵蚀造成的表土流失以及不补充养分造成的土壤肥力下降使一种可再生资源变成不可再生的资源。

Topsoil is polluted severely and borderland is lighter in heartland of polluted crude oil.

在原油污染中心地带，表层土壤受污染最重，边缘地带稍轻；

Effect of nutrient management on selected topsoil characteristics of a basalt derived Ferralsol in Dak lak ,Vietnam.

表5 养分管理对达拉克(Daklak)一种玄武岩发育的铁铝土基本些表土层性质的影响 Table 5.

A planting experiment showed that planting Suaeda salsa decreased salt content in the topsoil effectively,an...

研究证明碱蓬是一种耐盐能力很强的盐生植物,对滨海盐渍土具有显著的改良作用。

When all the topsoil is gone, nothing remains but worthless desert.

当表土层都被冲走后，就只留下沙漠了。

Dust storms occur when intense grazing strips pastureland of new growth, leaving the topsoil vulnerable to winds.

当密集的放牧导致新长好的牧草被啃光，让地表土容易被风刮走，沙尘暴就发生了。

The activities are high in the topsoil and low in the subsoil, decrease from rhizoplane soil to root-free soil for all three enzymes.

从表层土向下,由根表土向外,碳矿化速率及其相关的各种酶活性均呈下降趋势。