英文關鍵字
abstract
alarm
animated
animation
arrow
background
business
circle
clock
clockface
clockwise
concept
deadline
dial
element
equipment
flat
hand
hour
icon
illustration
isolated
line
linear
looped
minute
motion
movement
object
office
period
pink
rotate
round
second
sign
silhouette
simple
spin
spinning
symbol
time
timer
vector
video
watch
whirl
white
work