英文關鍵字
airport
asia
building
business
busy
city
commuters
crowd
crowded
customer
customers
down
elevator
empty
escalator
escalators
girl
group
indoors
inside
interior
mall
men
metro
modern
motion
move
movement
people
public
shop
speed
stair
stairs
stairway
station
steel
steps
store
subway
timelapse
traffic
transportation
underground
urban
walk
walking
way
women