英文關鍵字
abstract
across
adult
asphalt
background
bag
beautiful
black
business
busy
city
cross
crosswalk
crowd
day
downtown
foot
girl
human
intersection
leg
life
line
male
men
motion
path
pedestrian
people
person
professional
road
safety
shoe
sidewalk
sign
street
symbol
traffic
travel
urban
view
walk
walking
walkway
way
white
woman
young
zebra