英文關鍵字
2019ncov
air
aircraft
airplane
allergy
app
boy
care
cell
child
coronavirus
covid19
face
flight
fly
gadget
games
health
holding
holiday
journey
kid
looking
mask
mobile
pandemic
passenger
phone
plane
play
playing
plays
protect
protective
quarantine
smart
teen
teenager
touchscreen
tourism
tourist
transport
travel
trip
vacation
virus