Radio and television are important means of communication. 無線電和電視是重要的通信手段。
Out in the no-mans land of the international waters are the only means of communication with the submarines, to use radio in the VLF or ELF range. 在茫茫大洋深處，唯一可用的通信手段就是甚低頻或者極低頻無線電。
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