英文關鍵字
alarm
backdrop
background
black
blue
bomb
chronometer
clock
color
countdown
counter
dark
deadline
digit
digital
diode
display
electrical
electricity
electronic
fluorescent
gasdischarge
gasfilled
hour
indicator
interval
isolated
lcd
led
light
luminescent
luminous
minute
monitor
monochrome
neon
number
numeral
numeric
phosphor
screen
second
selfdestruction
stopwatch
tech
technology
time
timer
watch
zero