英文關鍵字
adult
american
animal
artiodactyl
askania
background
bison
breed
brown
buffalo
calf
calm
cattle
drought
dry
eat
endanger
family
feed
feeding
field
flock
generation
grass
herbivorous
herd
hollow
horn
horns
lie
life
livestock
mammal
many
massive
milk
mother
nature
nova
peacefulness
relict
rest
small
stand
steppe
wild
wildlife
wool
young