英文關鍵字
abandoned
bicycle
bike
blue
broken
city
cycle
decaying
depression
dirty
discarded
dumped
ecology
environment
environmental
flow
flowing
garbage
green
handlebar
junk
lifestyle
lost
metal
nature
old
pollute
polluted
pollution
ripple
river
riverbed
rubbish
rusty
sink
stream
transport
transportation
trash
travel
under
underwater
urban
vandalism
vehicle
waste
water
wheel
yellow