radio aid

例句：

1. 1. The doctor advised him to take radio aid for his pain.
   医生建议他接受无线电援助来缓解疼痛。
2. 2.The team used radio aid to communicate with the other side of the river.
   团队使用无线电援助与对岸进行通信。
3. 3.The rescuers sent out a loudspeaker message to ask for radio aid.
   救援人员发出了一个响亮的扩音器消息，请求无线电援助。