英文關鍵字
air
aircraft
alone
aviation
backdrop
background
basket
billow
blowing
calm
carrying
clouds
cloudy
craft
danger
drops
earl
ensign
event
hanging
helicopter
heritage
hover
identification
identity
land
landing
lift
maintenance
mechanic
pennant
perform
pilot
pride
rigging
rotary
rotor
rotorcraft
sky
supplied
thrust
tranquil
transport
upright
vertical
vertically
water
white