英文關鍵字
africa
african
aggressive
among
amphibious
amphibius
and
animal
animals
beast
big
closeup
conservation
danger
dangerous
environment
head
herbivore
highly
hippo
hippopotamus
in
is
lake
large
mammal
most
nature
outdoors
pool
ranked
river
safari
stream
submerged
surface
swim
the
two
underwater
unpredictable
water
wild
wildlife
x28
x29
zoo