英文關鍵字
agricultural
brook
chemical
clear
cold
coldness
creek
dirt
dirty
flow
fresh
garbage
hazardous
human
industrial
nature
plastic
plastics
poison
poisoned
pollution
refuse
river
rubbish
spring
stream
the
toxic
trash
unpolluted
waste
water
英文關鍵字
agricultural
brook
chemical
clear
cold
coldness
creek
dirt
dirty
flow
fresh
garbage
hazardous
human
industrial
nature
plastic
plastics
poison
poisoned
pollution
refuse
river
rubbish
spring
stream
the
toxic
trash
unpolluted
waste
water