英文關鍵字
automobile
background
backgrounds
business
car
careless
circle
conservation
damage
degraded
dirty
discarded
dump
environment
flexibility
full
garbage
group
heap
industry
isolated
large
level
light
nature
obsolete
old
outdoors
pile
pollution
problems
profile
recycle
recycled
recycling
rubber
rubbish
stack
stacked
stained
surface
texture
tire
transport
trundle
used
waste
wheel