英文關鍵字
silhouette
window
people
business
escalator
indoors
activity
crowd
travel
group
motion
mall
life
airport
urban
pedestrian
city
person
traveling
journey
destinations
architecture
passenger
scene
crowded
structure
pressure
floor
contemporary
elevator
steps
men
speed
man
active
building
staircase
timelapse
time
lapse
human
hall
transportation