英文關鍵字
accident
ambulance
area
arrest
authority
building
citizens
city
crime
danger
dangerous
dark
department
emergency
enforcement
equipment
flash
flasher
flashing
force
help
illuminated
inhabitants
killing
law
legs
light
lights
medical
murder
night
occupation
order
outdoor
outside
passing
place
police
problem
protection
rescue
robbery
scene
security
service
symbol
terrorism
view
waiting
witnesses