英文關鍵字
bike
sport
teen
bmx
bicycle
rider
boy
brakes
youth
extreme
urban
closeup
teenager
biker
man
male
cyclist
young
jump
leisure
fun
trick
cycle
biking
outdoor
action
freestyle
park
risk
stunt
ride
ray
race
outdoors
fast
wheel
concrete
transport
bicyclist
activity
people
trial
freeride
air
scene
background
portrait