英文關鍵字
animal
artiodactyls
dives
duckweed
female
fresh
hippo
hippopotamus
large
look
male
mammal
marsh
pond
surface
swims
water
zoo
英文關鍵字
animal
artiodactyls
dives
duckweed
female
fresh
hippo
hippopotamus
large
look
male
mammal
marsh
pond
surface
swims
water
zoo