英文關鍵字
adolescent
athlete
athletic
balance
blue
boy
cardio
caucasian
champion
danger
dangerous
development
equipment
extreme
fun
health
helmet
hobby
jump
kids
leisure
lifestyle
motion
motivation
outdoor
park
people
practice
protection
ramp
recreation
roller
rollerblader
rollerblades
schoolboy
skater
skating
skill
speed
sport
sportsman
sporty
strength
summer
training
trick
yellow