英文關鍵字
against
aircraft
airplane
airport
alarm
alert
aviation
beacon
building
bulb
business
city
cloudy
complex
danger
dawn
day
dof
dual
dull
electricity
emergency
equipment
evening
fire
high
landing
light
lighting
lights
moscow
notice
overcast
pair
pilot
plane
red
roof
safety
security
shallow
sign
signal
sky
skyscraper
top
traffic
two
warning
white