英文關鍵字
aeroplane
air
aircraft
airplane
atmosphere
aviation
blue
clear
commuting
condensation
condense
contrail
cross
daylight
droplets
engine
exhaust
flight
fly
gas
humidity
jet
journey
liquid
particles
plane
pollution
sky
skyscape
smoke
space
streak
stripe
tourism
trace
track
traffic
trail
travel
turbine
vapor
vapour
weather
white