英文關鍵字
advertisement
advertising
advice
amplifier
animation
announcement
attention
background
bullhorn
command
communications
cut
data
engage
footage
gain
horn
information
invite
isolated
join
loudspeaker
megaphone
message
mouthpiece
news
notification
object
one
people
pipe
recommendation
red
resonator
rotates
shout
shouting
single
sound
speaker
speakerphone
trumpet
video
white
word