topsoil

noun

1. 表土；表土层
   the layer of soil nearest the surface of the ground

1. 表土（层）
   Topsoil is the layer of soil nearest the surface of the ground.

1. A thin layer of topsoil was swept away.
   薄薄的一层表土被冲走了。
2. 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。
3. Studies show that ski runs increase erosion and destroy plant life beyond simply the growth cut down for the runs; they can also cause permanent damage to topsoil and plants beneath the surface.
   研究表明，滑雪道对植物的侵蚀和破坏不仅是砍伐它们、开辟坡道那么简单；它还会对表层土和地表以下的植物造成永久性破坏。
4. 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。
5. We calculated particle-size parameters using Moment law computation to study topsoil particle-size distribution of the Mo Us Desert.
   通过对毛乌素沙地表土粒度测定，采用矩法计算粒度参数，研究毛乌素沙地的表土粒度特征。
6. The loss of trees upsets the ecosystem as trees are necessary to build topsoil, maintain rainfall in dry climates, purify underground water and to convert carbon dioxide to oxygen.
   毁掉树木也就破坏了生态环境，因为树木可以维持表层土壤，保证干旱气候地带的降雨量，净化地下水，并将二氧化碳转化为氧气。
7. Effect of Different Conservation Tillage Measures on Maize Topsoil Fertility in Cold, Windy and Sandy Areas in Northeast China
   东北冷凉风沙区不同保护性耕作措施对玉米耕层土壤肥力水平的影响
8. Changes of topsoil bulk density and saturated hydraulic conductivity under infiltration condition of water storage pit
   蓄水坑入渗表层土壤体积质量和饱和导水率的变化
9. If the vegetation is damaged on account of the mining or construction, measures must be taken to rehabilitate the topsoil and vegetation, thereby preventing soil erosion.
   因采矿和建设使植被受到破坏的，必须采取措施恢复表土层和植被，防止水土流失。
10. Under flood conditions, great amounts of topsoil are washed to receiving streams.
    在洪水泛滥时，大量表层土壤被冲刷到承受的水流中。
11. The topsoil has been almost completely washed away.
    表土已差不多完全给冲走了。
12. Topsoil particle-size distribution and its spatial variation in Mo Us Desert Uranium fills interstitial space.
    毛乌素沙地表土粒度特征及其空间变异铀充填在颗粒间的空间。
13. A Study of Topsoil Organic Carbon Concentration and Density under Different Land Use in West River Basin, Guangdong Province
    不同土地利用形式下表土有机碳含量和密度特征的研究
14. Research of changing characteristics and control factors of farmland topsoil organic carbon in China
    中国农田耕层土壤有机碳变化特征及控制因素
15. Study on the Spacial Variability of Topsoil Heavy Metal of Dongguan City
    东莞市土壤重金属含量的空间变异性研究
16. If the topsoil is taken away by erosion, plants can no longer grow in the soil left behind.
    如果因水土流失而冲掉了表土，植物不能再在留下的土壤中生长。
17. Heavy rains washed the topsoil away. Deforestation causes erosion.
    大雨把表层土冲蚀掉了滥伐造成（土地的）冲蚀。
18. The storms cause respiratory illness, destroy crops and blow away precious topsoil.
    沙尘暴引发呼吸道疾病、毁坏庄稼，并吹走了宝贵的地表土。
19. Worse still, the annual torrential rains washed the topsoil from the hillside.
    更糟的是，每年都有暴雨把浮土从山坡上冲走。
20. The spatial variability of soil organic matter and phosphorous content was larger than that of the other nutrient in topsoil of artificial forestland.
    人工林表层土壤养分中有机质和速效磷的空间变异性较大；
21. Floods can remove fertile topsoil and begin a process resulting in the loss of planting areas.
    洪水可以带走肥沃的表土层，最终导致种植区域的损失。
22. This topsoil tends to wash away.
    表层土壤要冲掉了。
23. The fragile land quickly lost its topsoil and became nothing but sand and dust.
    那单薄的土地很快就失去了表土，成为沙粒和尘埃。
24. Characteristics of Cropland Topsoil Organic Carbon Dynamics Under Different Conservation Tillage Treatments Based on Long-term Agro-ecosystem Experiments Across Mainland China
    保护性耕作下农田表土有机碳含量变化特征分析&基于中国农业生态系统长期试验资料
25. The layer of soil between the topsoil and bedrock.
    位于上层土和岩床之间的一层土壤。
26. It would appear that the inputs are insufficient to offset the mobilization and leaching of calcium from the topsoil.
    钙的转入量看来不足以补偿从表土中活化和淋失的钙。
27. The loose heaped ground method of soil reconstruction on the platform can avoid the topsoil to be compacted, and greatly increase rainwater infiltration and disperse surface run off.
    排土场平台“堆状地面”土壤重构方法避免了表层土壤压实，并最大限度地增加了水分入渗和分散了地表径流，是解决上述问题的有效途径。
28. Study on Partical Size Variation of Topsoil under Different Land Use in Horqin Sandy Land
    科尔沁沙地不同土地利用状态下表土粒度变异研究

noun

1. the layer of soil on the surface

   Synonym:    surface soil