英文關鍵字
asia
asian
asphalt
bicycles
bulk
child
children
city
debris
dirt
dirty
dump
ecology
education
environment
environmental
friends
game
garbage
girls
health
heap
human
hygiene
issues
kids
life
lifestyle
live
lively
love
outdoors
people
play
pollution
poor
poverty
running
school
slum
slums
social
soil
sports
toxic
trash
travel
waste
water
young