英文關鍵字
abroad
aeroplane
aerospace
air
aircraft
airliner
airplane
altitude
aviation
background
blue
business
carbon
carbondioxide
clear
commercial
contrail
dioxide
distance
dusk
emission
evening
exhaust
fast
flight
fly
flying
high
jet
jetlag
journey
line
midair
plane
pollution
sky
smoke
speed
thrust
trail
transport
transportation
travel
vehicle
voyage