英文關鍵字
antarctica
arctic
bad
bergs
blue
boat
change
climate
coastline
cold
continent
desert
dry
environment
erosion
extreme
floats
frozen
glacier
global
hemisphere
ice
iceberg
landscape
melting
mountains
movement
nature
ocean
outdoor
polar
pole
preserve
remote
rocks
sea
shelves
snow
south
southern
surface
travel
unique
valleys
walls
warming
water
white
wind
winter