英文關鍵字
activity
adventure
aerial
aeronaut
aerostat
aerostatics
air
aircraft
airplane
apparatus
back
balloon
bright
brunette
cage
calm
color
device
direction
equipment
event
flight
float
fly
freedom
fuel
fun
hand
hot
instrument
large
leisure
man
measure
medium
moscow
nature
navigation
outdoors
person
pit
propane
recreation
rising
sky
transport
transportation
travel
vehicle
wind