英文關鍵字
abandon
alarm
alert
attention
background
beware
blinking
caution
computer
danger
dangerous
dirty
emergency
error
evacuate
evacuation
fail
fiction
flashing
hazard
illustration
information
light
looping
monitor
old
people
plane
red
retro
safety
science
screen
seamless
security
ship
sign
signal
skull
spaceship
symbol
system
unauthorised
unauthorized
vintage
warning
with
zombie
zombies