英文關鍵字
line
fume
chemtrails
sky
air
trail
commercial
condensation
flight
traffic
flying
journey
jetliner
international
fly
clear
fuselage
business
fast
airliner
pollution
travel
engine
vapor
atmosphere
trace
altitude
direction
cruising
transport
transportation
high
tourism
aircraft
jet
wing
contrail
speed
smoke
airplane
white
aviation
plane
aeroplane
passenger
blue
exhaust