Professor Bushberg says removing the topsoil might make the land safe for use. But it depends on the depth of the radioactive material.
布希柏格教授说，移除表层土壤可以保证土地的使用安全，但这取决于放射性物质渗入的深度。
He ordered tons of fertile topsoil to cover the grounds to a depth of five feet and full-grown specimens of the plants were trucked up the mountain for planting.
他定购了成吨肥沃的表层土，覆盖地面达5英尺深，把这些植物长好的样品用卡车运到山上种植。
With the increasing depth of coal mining in China, there is an immediate need to improve the strength and durability of high performance concrete used in deep topsoil mine shafts.
随着我国煤矿开采深度的不断加大，对深厚表土层立井井壁所使用的高性能混凝土的强度、耐久性等性质的要求也越来越高。
Thus, the different fertilization practices tended to(affect) not the depth distribution of TOC and POC but the content and proportion of POC in topsoil.
可见，不同的施肥处理并没有改变TOC和POC的深度分布格局，只是改变了它们在耕层土壤的含量以及POC的分配比例。
Thus, the different fertilization practices tended to(affect) not the depth distribution of TOC and POC but the content and proportion of POC in topsoil.
可见，不同的施肥处理并没有改变TOC和POC的深度分布格局，只是改变了它们在耕层土壤的含量以及POC的分配比例。
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