英文關鍵字
accident
adjust
adjustable
aeroplane
aircraft
airplane
belt
buckle
caution
equipment
fastener
flight
flying
girl
hand
journey
lap
latch
lifesaver
measure
measures
metal
open
passenger
person
plane
precaution
prevention
protect
protection
protective
safe
safety
seat
seatbelt
seated
secure
security
strap
tourist
transport
transportation
travel
unfasten
unlock