"dirty unswept sidewalks" "a child in dirty overalls" "dirty slums" "piles of dirty dishes" "put his dirty feet on the clean sheet" "wore an unclean shirt" "mining is a dirty job" "Cinderella did the dirty work while her sisters preened themselves"
Indeed, many refuse to take soiled tins. 没错儿，有污染的罐头听不能收。
Birds, especially those species that forage on the oil-slicked sea surface or on soiled beaches, are threatened, too. 鸟类，特吃别是那些在有浮油的海面和被污染的海岸上的草的鸟类也受到了威胁。
