英文關鍵字
adventure
african
amphibius
ancient
battlefield
botswana
breathe
chewing
close
danger
dangerous
daytime
diet
eat
enjoying
expressive
falls
feeding
flirt
float
giant
grazing
grumpy
habitat
hearty
herbivore
herbivorous
hippo
hippopotamidae
hippopotamus
hippopotamuses
his
hungry
killer
lunch
mammal
meal
murchison
omnivore
partner
plant
pseudoruminant
semiaquatic
skin
smiling
snack
species
stream
submerged
supporter
surfacing
threatened
tooth
triumph
vegetable
victory
vulnerable
waiting
wet
wilderness
wildlife