英文關鍵字
039
africa
african
amphibious
animal
aquatic
big
botswana
danger
dangerous
difficult
enjoying
fat
fauna
grass
hippo
hippopotamus
hippos
huge
lake
large
mammal
mammals
massive
mouth
national
natural
nature
park
reserve
river
safari
safaris
savannah
savannahs
south
sun
swim
teeth
type
water
wet
wild
wilderness
wildlife