portable recorderreceiver

例句：

1. 1. The recorder receiver is the heart of the recording system.
   记录器接收器是录音系统的心脏。
2. 2. The microphone is used to receive sound signals from the environment.
   麦克风用于从环境中接收声波信号。
3. 3. The audio signal is then sent to the recorder receiver for playback.
   音频信号随后被发送到记录器接收器以供回放。