英文關鍵字
air
aircraft
airline
airplane
aisle
aviation
business
cabin
chair
china
chinese
class
comfortable
commercial
danger
direction
door
doorway
economy
emergency
empty
exit
flight
fly
help
indoor
inside
interior
jet
metal
modern
nobody
passenger
plane
protection
row
safety
seat
security
sign
sky
symbol
transport
transportation
travel
warning
window