| 释义 |
public-address system
\| ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷-\ noun
: an apparatus including one or more microphones or other pickup devices, an audio-frequency amplifier, and one or more loudspeakers used for broadcasting speech, music, or other sounds to a large audience (as in an auditorium or out of doors) — called also PA system |