英文關鍵字
animal
antarctic
antarctica
arctic
argentinian
base
berg
carbon
cold
cry
environment
floe
fur
global
hydrurga
ice
iceberg
icecap
leopard
leptonyx
mammal
mammals
marine
melting
mountain
mouth
moving
nature
ocean
pack
peninsula
polar
pole
sea
seal
sleeping
snow
south
teeth
travel
video
waddle
warming
water
white
wildlife
winter