英文關鍵字
alarm
alert
appointment
arrow
background
bell
business
circle
clock
concept
countdown
day
deadline
dial
element
face
hands
hour
indoors
late
measure
measurement
midday
midnight
minute
modern
nobody
noon
number
object
outline
pointer
precise
punctual
retro
ring
running
schedule
second
sign
speed
start
style
symbol
time
timer
urgent
wall
watch
white