英文關鍵字
adventure
boy
cheerful
cold
day
december
down
downhill
dynamic
extreme
fast
forest
fun
game
happiness
happy
hill
ice
joy
leg
leisure
mountain
nature
outdoor
park
person
playing
ride
riding
rolling
season
sled
sledding
sledge
slide
slippery
slope
snow
speed
sport
teenager
white
winter