英文關鍵字
river
help
volunteer
nature
trash
collect
bag
outdoor
lake
girl
garbage
rubbish
ecosystem
ecology
eco
summer
volunteering
clean
waste
charity
care
environment
recycling
recycle
holiday
picking
woman
dirty
community
collection
cheerful
plastic
bottle
beach
pollution
bags
background
litter
event
water
portrait
shore
organization
spring
young
collecting
hand
friendship
disposal