soil background 土壤背景
soil background value 土壤背景值
background value of soil environment 土壤环境背景值
background value of soil element [土壤] 土壤元素背景值
soil environmental background value 土壤环境背景值
geological background of soil 土壤地质背景
soil background values 土壤背景值
background level of soil 土壤背景值
background value of soil 土壤元素背景值
Here, where the river gently winds through the girdle of hills, lies a soil so saturated with the past that however far back the mind roams one can never detach it from its human background.
塞纳河在这儿静静地绕过群山，它喜爱这片浸透往事的土地，因而不论一个人的思绪漫游到何处，他永远不会把这条河同人类的活动分开。
Basic data in mapping soil background content has 302 analytical data of soil elements and regional distribution which are mapped with computer plotting and factor analysis.
编制土壤背景值图的基础资料有302个样点的无素测定值和运用计算机制图和因素分析法揭露的元素区域分布规律。
With the background of soil salinity in the plain of North China, a water-heat-salt movement of soil water in unsaturated-saturated region is studied by numerical simulation.
本文以我国北方平原的土壤次生盐化为背景，对土壤中饱和—非饱和水的水—热—盐一维运动模型进行了数值模拟。
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