英文關鍵字
action
adult
automobile
boy
car
carting
child
defence
digits
display
drive
fast
fun
grandfather
grandson
hand
helmet
hobby
human
indoor
inside
instructor
karting
kid
little
look
male
man
motion
movement
numbers
passes
people
race
ride
senior
signals
speed
sport
stand
suit
together
track
two
tyre
uniform
watch
young