英文關鍵字
antarctica
arctic
bergs
blue
boat
change
climate
clouds
coastline
cold
desert
earth
environment
expedition
exploration
extreme
floats
freshwater
frozen
glacier
global
hemisphere
ice
iceberg
landscape
melting
mountains
movement
nature
ocean
outdoor
polar
pole
precipitation
preserve
sea
shelves
sky
snow
south
southern
surface
tourism
travel
unique
walls
warming
water
white
winter