[42-19] noxious
adj.有害的;有毒的(poisonous, toxic)[42-19] pollute
vt.污染(contaminate, defile)[42-19] pollutant
n.污染物质[42-19] pollution
n.污染,玷污[42-19] contaminate
vt.污染(defile, pollute)[42-19] sewage
n.下水道,污水[42-19] fume
n.(浓烈或难闻的)烟,气体[42-19] habitat
n.(动、植物的)生活环境,居留地(home, environment)