英文關鍵字
adult
alone
asphalt
background
because
careful
casual
cerebral
city
concrete
cross
crossing
crosswalk
danger
day
difficult
disability
disabled
floor
gray
has
hes
lameness
leg
legs
limp
limping
line
man
modern
movement
one
outdoor
palsy
paralysis
pathway
pavement
pedestrian
people
person
petersburg
public
road
russia
safety
sidewalk
space
street
surface
texture
town
travel
trip
urban
walk
way
white