发射机

例句：

1. 1. The engineer needs to replace the old transmitter with a new one.
   工程师需要用新的发射机替换旧的发射机。
2. 2. The scientist used a transmitter to send signals across the distance.
   科学家使用发射机发送信号跨越了距离。
3. 3. The transmitter is responsible for converting electrical signals into sound waves.
   发射机负责将电信号转换为声波。