topsoil是什么意思_音标_用法_例句

简单释义：

n. 表土；表土层

网络 表层土；上层土；耕层

变形：

过去分词：topsoiled  现在分词：topsoiling  第三人称单数：topsoils  

完整释义：

n.

1.表土,表层土壤,表面土壤
2.表土;耕作层土壤
3.上层土;表层土
4.土壤上层
5.耕层
6.植物生长层

例句：

1. Angkor may have suffered problems common to modern times, including deforestation, overpopulation, topsoil degradation and erosion.
   吴哥可能已经遭受过和现代相同的问题，包括滥伐森林，人口过剩，表土退化和侵蚀。

2. Conserving the earth's topsoil by reducing erosion to the rate of new soil formation or below, involves two principal steps.
   通过将地球表层土的受侵蚀速度降低到新土形成的速度甚或更低，来保护表层土，其中包括两个关键步骤。

3. Located on a prehistoric lake bed, which accumulated nutrient-rich sediment, contributing to the fertile topsoil.
   农场建立在史前湖床之上，这里积聚了富含营养的沉积物，形成了肥沃的表层土。

4. Thus the farmer is helping nature rebuild the topsoil that holds the rain, resists the wind and provides food for growing plants.
   因此，农民是协助大自然重建能够存蓄雨水、抵抗风力和滋养各种植物的表面土壤。

5. the hollow block is close to the topsoil and has larger contact area with the topsoil, which causes the block not easily shed.
   接近表层土，与表层土体的接触面积更大，块体不易脱落；

6. After shoveling out the topsoil, Garfinkel uncovered coins and other artifacts from the time of Alexander the Great.
   在铲去了表层土以后，加芬克尔发现了来自亚历山大大帝时期的硬币和其他人工制品。

7. When digging a hole for planting, one should put topsoil and subsoil in two different sides of the hole.
   挖栽植坑时，应将表土和底土分别放在坑的两侧。

8. Aerodynamics roughness length is one of important indexes for estimating topsoil erosion.
   耕作土壤表面空气动力学粗糙度是评价土壤可蚀性的重要指标。