英文關鍵字
activity
adult
balance
blade
blow
boots
brake
bruise
cling
concussion
danger
drop
fall
falls
feet
foot
fracture
frosty
hat
hood
ice
impact
injury
jacket
legs
man
motion
outdoor
pain
rink
shoes
skate
skates
skating
skiing
slide
sliding
slip
slippery
slow
snow
sparks
speed
sports
stumble
stumbles
while
winter