英文關鍵字
16022021
building
business
busy
city
commuter
commuters
commuting
crowd
elevator
escalator
group
handrail
industry
line
metro
moscow
movement
moving
night
passenger
people
person
public
queue
ride
russia
safe
safety
snow
stairs
stairway
station
storm
subway
traffic
transport
transportation
travel
tunnel
underground
urban
walkway
winter