英文關鍵字
africa
african
bacteria
boy
boys
child
childhood
children
cholera
clean
cleaning
countries
crisis
developing
development
drink
drinking
female
females
fresh
freshwater
girl
girls
illness
issue
issues
kid
kids
life
live
soap
soapy
social
society
south
sudan
symbol
thirst
thirsty
two
unhygienic
village
wash
washing
water
woman
women
young