名词 impurity:

1. worthless or dangerous material that should be removed

2. the condition of being impure

impn.小恶魔；顽童v.装上翅膀；移植羽毛abbr.工业管理程序（=Industrial Management Program)abbr.接口信息处理（=Interface Message Processor)abbr.星际监视探测人造卫星（=Interplanetary Monitoring Probe Satellite)impram丙咪嗪(抗抑郁药)

1. Filtering the water removed some of its impurities.
   把水过滤一下除去了一些杂质。
2. Workers are removing impurities from silver.
   工人们正去除银中的杂质。