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contaminate
vt.污染(defile, pollute)
The department of Resources notified the town council that the water supply was contaminated.
资源部通知镇议会水源被污染了。
pollute
vt.污染(contaminate, defile)
Rivers in the neighbourhood were polluted by the chemical wastes from the factories.
附近的河流被工厂排出的化学废弃物污染了。
taint
v.感染；使腐坏 n.污点
The meat was tainted.
肉坏了。
purify
vt.使纯净(cleanse) v.净化
This salt has been purified for use in medicine.
盐净化后用于医学。
pollutant
n.污染物质
ecosystem
n.生态系统
noxious
adj.有害的，有毒的(poisonous, toxie)
The room is full of noxious fumes.
房间充满了有毒气体。
toxic
adj.有毒的，中毒的(noxious, poisonous)
lethal
adj.致命的(fatal)
venomous
adj.有毒的，分泌毒液的
The government announced that friuts produced in the region was contaminated and thus all the fruits become venomous.
政府宣称该地区生产的水果被污染了，因此所有的水果都是有毒的。
deteriorate
v.(使)恶化
The water in the catchment has deteriorated in the last month.
该流域的水从上个月就恶化了。
pernicious
adj.有害的
decibel
n.分贝
hazardous
adj.危险的(noxious)
effluent
n.流出物；排水道，排水渠；污水
Dangerous effluent from some chemical plants is being poured into the river through the town.
一些化学工厂排出的有害废水正流入穿过城市的河流里。
