英文關鍵字
acceleration
accretion
ahead
business
chance
chronometer
clock
concept
countdown
counter
counting
deadline
enhancement
enlargement
extension
fast
fire
hour
hurry
idea
important
increase
instrument
last
limited
logo
measure
measurement
mechanism
minute
motion
newborn
now
offer
only
pickup
second
speed
speeding
speedometer
stopwatch
time
timer
today
urgent
vector
watch
faster
ungent
rapid
concepts