He profiles soil samples from the past 200 years and extrapolates concentrations of heavy metals and foreign substances into a future without industrial inputs.
他研究了过去200年间的泥土样本并预测，重金属和杂质的集聚物会留到没有工业投入的未来。
The heavy metals were irregularly distributed in soil profiles.
重金属在土壤剖面分布没有规律性；
Milling machines for preparation of welding edge profiles on plates and strips of steel and non-ferrous-metals!
铣削机板和条钢和非铁金属焊接边型材准备！
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