英文關鍵字
acceleration
active
athlete
bend
benefit
big
competition
competitions
cycle
dangerous
dirt
dirtbike
drift
driver
efficiency
extreme
faster
friable
fun
games
gritty
inclination
land
maneuvers
mode
motocross
motorbike
motorcycle
motorcycling
motorcyclist
mud
plume
position
racer
racing
rider
risk
risky
rotation
sand
sandy
sideslip
spoke
sportsman
thrust
tilt
track
wheels
x