英文關鍵字
action
adventure
bicycle
bike
biker
biking
caucasian
clear
clearly
clip
closeup
clothing
cycle
cycling
danger
defined
dense
dirt
drop
excitement
exercising
exhilaration
extreme
ferns
forest
freedom
freeride
fun
green
healthy
helmet
jump
lifestyle
lifestyles
male
man
men
motion
mountain
mtb
nature
off
one
orange
outdoors
person
plants
recreation
riding
safety
slow
sport
sports
stunt
sunlight
teenager
through
track
trails
trees
trunks
undulating
vegetation
vibrant
video
vitality
wearing
wheel
where
white
young