英文關鍵字
adolescent
athlete
blue
boy
career
caucasian
champion
cheer
children
development
encouragement
equipment
extreme
family
fan
fun
greeting
happy
having
helmet
hobby
hug
hugging
kid
kneecaps
leisure
love
mom
mother
outdoor
park
people
recreation
rollerblader
rollerblading
rolling
run
running
son
sports
summer
support
training
winner