英文關鍵字
alarm
background
black
board
bright
button
celebrate
chronometer
clock
count
countdown
counter
counting
deadline
design
digit
digital
display
electronic
event
glow
hour
interval
large
lcd
led
light
matte
minute
monitor
number
numbers
numeric
objects
past
red
score
scoreboard
screen
set
speed
stop
symbol
technology
television
time
timer
watch
zero