英文關鍵字
adjust
adjusting
amplifier
audio
broadcasting
button
center
control
deejay
disc
electrical
electronic
entertainment
equipment
finger
hand
holding
human
ideas
indoors
knob
level
listening
loud
loudness
metallic
modern
music
news
panel
push
radio
radiostation
radiowaves
receiver
round
settings
shiny
silver
sound
stereo
studio
switch
technology
thumb
touch
tuner
tuning
turn
volume