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radio broadcast communication 无线电广播通讯
In modern radio technology components such as communication, broadcast, television and radar system, the radiation and receiving of the radio waves are inevitably, then antenna is needed.
通信、广播、电视、雷达、导航等无线电技术设备中，都需要有无线电波的辐射和接收，进而离不开天线设备。
Almost 7 million birds are killed each year when they fly into communication towers that broadcast TV and radio and make cellphone conversations possible.
通信塔发送电视和电台信号，让手机对话成为可能，然而每年大约有七百万只鸟类因撞上通信塔而死亡。
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