英文關鍵字
background
bottle
city
cover
dirt
dirty
drain
drainage
environment
garbage
grate
grid
hole
pavement
plastic
rain
rapid
road
sewage
sewer
street
tube
urban
water
英文關鍵字
background
bottle
city
cover
dirt
dirty
drain
drainage
environment
garbage
grate
grid
hole
pavement
plastic
rain
rapid
road
sewage
sewer
street
tube
urban
water