英文關鍵字
3d
abstract
action
antique
background
black
business
classic
clock
closeup
concept
countdown
deadline
falling
flowing
glass
hour
hourglass
instrument
life
measure
measurement
measuring
minute
money
motion
nature
object
old
passing
past
patience
pressure
running
sand
sandglass
second
space
speed
stopwatch
surface
time
timer
transparent
vintage
watch
white