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