收发器

例句：

1. 1. The phone is a device that allows us to receive and send messages.
   电话是一种允许我们接收和发送消息的设备。
2. 2. This microwave oven can be used for both receiving and transmitting signals.
   这种微波炉既可以用于接收信号，也可以用于发射信号。
3. 3. The receiver is the part of the radio that picks up the signal from the transmitter.
   接收器是收音机的一部分，它从发射器那里接收信号。