The network made a simultaneous broadcast by radio and television.
联播网使得广播和电视可以同时播出同一节目。
About the only possibility for maintaining compatibility is simultaneous broadcast of NTSC information over certain channels and HDTV information over other channels.
保持兼容唯一的可能是在特定的信道广播ntsc信号，而在其它信道广播HD TV信号。
About the only possibility for maintaining compatibility is simultaneous broadcast of NTSC information over certain channels and HDTV information over other channels.
保持兼容唯一的可能是在特定的信道广播ntsc信号，而在其它信道广播HD TV信号。
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