button microphone

例句：

1. 1. The engineer tested the microphone to ensure it was working properly.
   工程师测试麦克风以确保其正常工作。
2. 2. The singer used a button microphone to record their performance.
   歌手使用按钮麦克风来录制他们的表演。
3. 3. The teacher placed the microphone at the front of the classroom to capture everyone's voice.
   老师将麦克风放在教室前面，以便捕捉到每个人的声音。