英文關鍵字
abstract
background
chemical
clean
close
danger
dirty
dishwasher
drain
drainage
dump
ecology
environment
environmental
flow
flowing
garbage
home
hotel
house
industrial
kitchen
liquid
mosquito
moss
mossy
nature
old
pipe
pipeline
polluted
pollution
reflection
running
rust
rusty
sewage
sink
storm
stream
tap
texture
toxic
tube
vintage
waste
wastewater
water
waves