英文關鍵字
air
aircraft
airplane
altitude
aviation
blue
bright
cloud
clouds
color
daytime
flight
fly
flying
heaven
high
holiday
horizon
image
jet
journey
light
looking
machine
metal
metallic
plane
power
shadow
shady
sky
space
sunny
technology
transport
transportation
travel
trip
vacation
vehicle
view
white
whitecaps
window
wing