英文關鍵字
adult
africa
african
angry
animal
aquatic
background
big
body
brown
can
close
coast
creature
cute
dangerous
eat
education
eye
face
fat
fauna
feed
flowers
grass
grey
happy
head
hipopotam
hippo
hippopotamus
huge
jaw
large
lazy
life
looking
male
mammal
mouth
national
natural
nature
nice
open
original
park
red
river
side
species
underwater
view
water
wild
wildlife
wind
young
zoo