对土壤重金属污染物来源的鉴别是准确、有效控制和治理污染源的前提。
Source identification of heavy metals was the precondition of preventing and controlling pollution.
在稳定的土壤发育条件下，土壤剖面有可以鉴别的诊断层，其中一些性状特征沿剖面分异明显。
Soil profiles have the obvious diagnostic horizons and properties and characteristics of soils have distinct change along their profile depth under stable conditions of soil development.
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