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topsoil

n. 表层土；上层土

1、表土

北方典型区域果园表层土壤农药类POPs残留特征分析关键词：POPs；果园；表土；残留特征；典型区域 [gap=2150]Keywords：POPs；orchard；topsoil；remaining characters；typical production zone

2、表土层

...表土层（Topsoil）是在田野考古发掘时首先要遇到的遗迹现象。该土层叠压于古代遗迹的最上层，接近于现代人的活动面，由于近现代人对其进行了持续的...

3、表层土

... thereby因此，从此 topsoil表层土 transit运输（线），转变 ...

4、土壤表层

... imported topsoil 外来表土 topsoil? 土壤表层 black topsoil 黑表土 ...

topsoil cultivation浅松作业

deep topsoil深厚表土层

topsoil driving表土掘进

crusted topsoil表土结皮

imported topsoil外来表土

primordial topsoil原生表土

环境科学技术

地球科学

生物学

n.the layer of soil on the surface

同义词：surface soil

1.
N-UNCOUNT（不可数名词） Topsoil is the layer of soil nearest the surface of the ground. 顶层土

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