LLCD is NASA's first system for two-way communication using a laser instead of radio waves.

LLCD是NASA的第一个使用激光而不是无线电波的双向通信系统。

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A simple RFID system consists of reader and transponder, by wireless two-way radio communication, target recognition and data exchange.

射频识别系统主要由读写器、应答器两部分组成，通过射频方式进行无线双向通信，完成目标识别和数据交换。

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Currently, the field of domestic conventional Two-way radio remains basically in the stage of analog communication technology.

就目前而言，国内常规对讲机领域仍基本停留在模拟通信技术阶段。

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Digital radio, because of error correction requirements inherent in two-way radio communication, is substantially more fragile than the older analog radio systems.

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