英文關鍵字
broom
brush
car
city
clean
cleaner
cleanup
dirty
dust
environment
equipment
garbage
industrial
industry
machine
motion
outdoor
outdoors
pavement
road
rubbish
service
street
sweeper
sweeping
truck
urban
vehicle
wheel
work
英文關鍵字
broom
brush
car
city
clean
cleaner
cleanup
dirty
dust
environment
equipment
garbage
industrial
industry
machine
motion
outdoor
outdoors
pavement
road
rubbish
service
street
sweeper
sweeping
truck
urban
vehicle
wheel
work