英文關鍵字
aircraft
plane
airplane
trail
flight
fly
lilac
blossom
roof
white
branches
sky
air
airliner
aviation
fast
high
line
speed
tourism
transport
transportation
bloom
blue
airline
atmosphere
nature
travel
vacation
vapor
aeroplane
clear
commercial
day
journey
landscape
spring
pollution
smoke
space
sunny
trace
track
wing
motion
beautiful
light
contrail