英文關鍵字
autumn
care
city
clean
cleaning
cleanup
communal
dark
dirt
dry
earth
ecology
environment
equipment
foliage
garbage
garden
gardening
grass
ground
housing
lawn
leaf
leaves
man
municipal
nature
noise
orange
outdoor
outdoors
park
person
rake
removal
season
service
services
spring
street
sweeper
sweeping
tool
trash
urban
vest
waste
work
worker