英文關鍵字
axle
bicycle
bike
bikes
chain
chainring
cycle
cycling
dark
detail
display
evening
fast
gears
late
machine
mountain
night
object
pedal
pedaling
pedalling
pedals
repair
repairs
rim
ring
rotate
rotates
rotating
spinning
spins
spoke
spokes
sport
sports
tire
tires
turning
turns
typical
tyre
tyres
wheel
wheels