英文關鍵字
africa
african
assistance
background
black
boy
brown
child
childhood
clean
climate
concept
crisis
culture
cupped
descent
desert
drink
drought
dry
earth
ecology
environment
ethiopia
faucet
field
hand
healthy
help
hiv
homeless
human
illness
lifestyle
natural
nature
people
person
poverty
purity
relief
service
social
soil
spring
unhygienic
washing
water
wet