英文關鍵字
adrenaline
adventure
aircraft
airplane
airport
antarctic
antarctica
arctic
aviation
barneo
blade
change
copter
diving
drifts
ecological
ecology
equipment
expedition
extreme
ice
landing
midair
nature
north
polar
pole
propeller
robinson
rotor
science
scientists
scuba
silhouette
sky
small
snow
solar
sun
sunlight
temperature
tourism
transport
travel
weather
white
winter