英文關鍵字
collective
boy
girls
riding
tandem
team
ride
bicycle
together
characters
successful
teamwork
progress
relationship
people
business
bike
cooperation
man
activity
competition
corporate
cycle
effort
occupation
partnership
person
race
speed
sport
togetherness
transportation
wheel
bicyclist
bicycling
cycling
cyclist
friendship
friends
riders
company
male
female
group
active
leisure
motion
graphic
animation
hd