英文關鍵字
abstract
amplifier
analyzer
art
audio
background
bar
black
blank
block
blue
change
channel
control
count
design
digital
display
electronic
equipment
fluorescent
frequency
graph
leisure
light
media
meter
monitor
motion
movie
multimedia
music
noise
peak
screen
set
signal
snow
sound
spectrum
strip
technology
television
tv
video
voice
volume
watch
wave