英文關鍵字
active
africa
african
aggression
aggressive
animal
beast
big
body
bubbles
cautious
danger
dangerous
displaying
dive
dominance
dominant
entertain
fauna
fine
giant
happy
hipo
hippo
hippopotamus
huge
large
mammal
mouth
nature
open
outdoor
park
relaxing
river
sharp
south
splendid
sun
sunny
swim
tooth
water
waterhorse
wide
wild
wilderness
wildlife
zoo