英文關鍵字
antisterility
ashcan
biocontamination
conditions
contamination
debris
dirt
dirty
dirtying
drain
drift
dump
dust
dustbin
dusthole
ecological
ecology
environment
float
foul
garbage
global
insanitariness
insanitary
insanitation
junk
junkyard
landfill
litter
lumber
muddy
ordure
plastic
pollute
polluted
polluting
pollution
recycle
recycling
refuge
refuse
rubbish
sanitary
scrap
scrapheap
sea
sweeping
trash
waste
water