英文關鍵字
alarm
clock
clockwork
close
code
countdown
counter
counting
crystal
deadline
digit
digital
digits
display
electronic
electronics
equipment
gadget
illuminated
instrument
lap
lcd
led
liquid
medical
minute
morning
number
numbers
numeral
numeric
object
oled
power
precision
reminder
science
screen
second
split
stopwatch
tech
technology
tick
time
timer
tock
visual
watch