英文關鍵字
bicycle
bike
black
chain
closeup
cycle
cyclist
derailleur
detail
equipment
exercise
fast
gear
gearing
gearshift
gearwheel
hand
mechanism
outdoor
rear
ride
road
shift
shifter
speed
sport
sprocket
steel
transmission
wheel
英文關鍵字
bicycle
bike
black
chain
closeup
cycle
cyclist
derailleur
detail
equipment
exercise
fast
gear
gearing
gearshift
gearwheel
hand
mechanism
outdoor
rear
ride
road
shift
shifter
speed
sport
sprocket
steel
transmission
wheel