Among the 118 surface soil samples, 42(corresponding to 35.6%) were above the national standards when evaluated with single factor index method.
结果表明，以单因子污染指数评价，在118个表层土壤样品中，有42个样品的重金属含量超标，超标率为35.6%。
Surface soil samples were collected in the deserts and Gobi regions of China. The carbonate content and carbon and oxygen isotopic composition were analyzed.
在中国的主要沙漠和戈壁等粉尘源区采集了地表沙或土壤（统称为表土）样品，分析了样品的碳酸盐含量和碳酸盐的碳氧同位素组成。
Although all sub-surface samples contain higher mercury than surface samples, the contents of Hg in profile soil overlying garbages of different maturities show different trends of variation.
不同成熟度垃圾的上覆土壤中汞都具有次表面样品总汞含量高于表面样品的特点，但变化趋势不同。
Undisturbed soils samples obtained from surface and subsurface soil layers under different forests were used to make thin sections and study micro-morphological characteristics.
分别采制上述不同土壤类型或林型下的土壤表层和表下层的原状土祥，制取土壤薄片，进行土壤微形态学比较研究。
Undisturbed soils samples obtained from surface and subsurface soil layers under different forests were used to make thin sections and study micro-morphological characteristics.
分别采制上述不同土壤类型或林型下的土壤表层和表下层的原状土祥，制取土壤薄片，进行土壤微形态学比较研究。
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