英文關鍵字
action
activity
adventure
athlete
bicycle
bicyclist
bike
biker
biking
cross
crosscountry
cycle
cyclist
dirt
downhill
equipment
extreme
fast
fit
fitness
forest
guy
healthy
helmet
hill
jumping
leisure
lifestyle
male
mountain
mountainbike
mud
off
offroad
pedal
person
protection
race
recreation
ride
rider
riding
risk
road
speed
sport
trail
young