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The mobile fractions of heavy metals, namely EXCH, CAR,FeMnOX, and OMB, also influenced their leaching concentrations. Especially the EXCH andFeMnOX of Cu, Zn and Pb were negtively correlated with their contents in soil solution.The bioleaching with Thiobacillus ferrooxidans was used for decreasing concentrations of heavy metals in sewage sludge.

土壤中EXCH、CAR、FeMnOX及OMB形态重金属的变化与其溶出量显著相关，特别是以EXCH与FeMnOX形态存在的Cu、Zn、Pb含量的变化均与其溶出量呈显著负相关关系。5、利用以FeSO_4为底物的氧化亚铁硫杆菌对污泥进行生物沥滤去除重金属。

Dry distillation, despite its name, is not truly distillation, but rather a chemical reaction known as pyrolysis in which solid substances are heated in a strongly reducing atmosphere and any volatile fractions are collected.

干馏，尽管名称如此，但实际上不是蒸馏，而是一种广为人知的热分解反应，反应中，固体物质在强烈的减压状态下受热，任何挥发性组分都被收集下来。

Total concentrations,chemical fractions and release potential of heavy metals in topsoil samples collected at 82 locations in Hangzhou City were measured to: i assess their distribution in urban environments;ii understand their differentiation as related to land use;and iii assess their environmental risk.

结果表明，该市城市土壤中重金属均有不同程度的积累，重金属含量一般以商业区和工业区最高，农业区较低；居民区土壤重金属的积累随居民区建成时间的增加而增加。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。