英文關鍵字
assembling
autumn
bench
clean
cleaning
cleansing
collect
collection
color
day
daylight
daytime
down
eco
ecology
fall
friendly
from
garbage
gardener
gathering
green
guy
holding
human
janitor
landscape
leaves
litter
looking
male
man
men
nature
near
outdoor
outdoors
outside
park
person
rake
recycling
rubbish
side
the
tired
use
watching
with
worker