Copper is a contaminant that can mess up nonmetallic stages of the manufacturing process , so the machines that add copper need to be carefully segregated .
铜是一种污染物，会对非金属加工过程造成混乱，因此用于添加铜质电路的机器需要被仔细的隔离。
The group 's research activities include contaminant hydrogeology and regional hydrogeology .
其主要研究范围包括污染物水文地质学和区域水文地质学。
Spatial variability of hydraulic conductivity is very important for contaminant transport through liners .
衬垫渗透系数的空间变异性对污染物运移有重要影响。
" The whole notion of adding an amendment to the soil to change the mineral form of a contaminant and make it safe is great , " said sally brown , a research professor in ecology and environment at the university of washington .
In the ic process , the residual contaminant is extremely harmful to our device characteristic , especially the effect of metal contaminant to the initial dielectric breakdown of silicon oxide layer .
