英文關鍵字
africa
african
bacteria
beautiful
boy
boys
child
childhood
children
cholera
clean
cleaning
countries
couple
developing
development
drink
drinking
fresh
freshwater
girl
girls
happy
issue
issues
love
one
people
poor
portrait
poverty
smile
soap
soapy
social
society
south
sudan
symbol
together
two
wall
washing
water
woman
young