... 声耦合 接到电话线路的nacoustic coupling 声频电报 acoustical telegraphy 声频电报机 audio frequency telegraphy ...
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His voice shook with fear他害怕得声音发抖 voice-frequency telegraphy声频电报 A voice within told him what to do.在他内深处有个声音告诉他该怎么办。
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