英文關鍵字
airlines
airport
ammonium
arrival
arrive
bag
baggage
bomb
border
canine
check
control
conveyor
crime
cute
detecting
detection
dog
drug
enforcement
explosive
federal
fighting
finding
hexogen
luggage
obedient
officer
opium
police
port
prohibited
search
security
serve
service
smell
sniff
sniffer
sniffing
suitcase
terror
terrorism
trained
trotyl
weapon
working