Your mobile device is a radio transmitter and receiver.

您的移动设备是一个无线电发射机和接收机。

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Each cell is equipped with a low-powered radio transmitter and receiver that permit propagation of signals among cell-phone users.

每个蜂巢装备有小功率的无线电发射器和接收器，使信号能在手机用户之间传播。

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And as a failsafe, the receiver also sends a message to the transmitter via radio if it notices an unexplained interruption in power reception.

同时作为故障保护，如果接收器发现能量接收端有一个无故中断，还会通过无线电向传输器发送一个信息。

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Each onboard ADS-B set consists of a Global Positioning System satellite navigation unit, two Pentium microprocessors, some software and a radio transmitter-receiver--not much more gear than you would find behind the dash of a new Cadillac.

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