英文關鍵字
ancient
animal
animals
artiodactyl
aviary
bison
bonasus
book
buffalo
bull
care
center
cold
december
ecotourism
endangered
environment
field
forest
fur
head
herd
his
horned
horns
hybrid
large
leningrad
nature
nursery
park
pen
protection
red
region
reserve
russia
side
skin
snow
species
stands
turning
wild
winter
wool
zoo