英文關鍵字
activity
airport
architecture
automatic
background
building
city
climb
electric
elevator
empty
escalator
exit
floor
indoor
inside
life
lift
mall
metal
metro
modern
motion
move
movement
nobody
passengers
people
run
shopping
stair
staircase
stairway
station
steel
step
subway
technology
terminal
train
transport
travel
trip
underground
upstairs
urban
video
walkway
way