microphone carbon powder

例句：

1. 1. The recording studio needs a good microphone to capture the sound.
   录音室需要一个好麦克风来捕捉声音。
2. 2. She used a microphone to broadcast her message to the audience.
   她使用麦克风向观众广播她的信息。
3. 3. The musician was using a microphone to record his performance.
   那位音乐家正在用麦克风录制他的表演。