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