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。
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Almost 7 million birds are killed each year when they fly into communication towers that broadcast TV and radio and make cellphone conversations possible.