英文關鍵字
airline
airplane
airport
arrival
business
businesswoman
coronavirus
covid
covid19
departure
distance
empty
epidemic
female
flight
flu
global
health
illness
infection
journey
luggage
mask
outbreak
pandemic
passenger
people
plane
prevention
protection
quarantine
respiratory
safety
terminal
tourism
tourist
transport
travel
traveler
trip
vaccine
virus
waiting
woman