有些宝宝听到水龙头流水的声音，无线电静电干扰的声音，自然界各种声音或白噪音的录音，甚至是吸尘器持续的嗡嗡声都会安静下来。
Some babies may also be calmed by the sound of a running faucet, a radio set on static, a recording of nature sounds or white noise—even the steady hum of the vacuum cleaner.
没有电，我们既不能看电视，听录音，也不能在网上聊天。
Without electricity, we can neither watch TV, listen to the tape, nor chat on line.
电灯泡、电冰箱、录音机、电视机和空调都是以电来做动力的。
Light bulbs, refrigerators, recorders, televisions, air conditioners are all powered by electricity.
这些录音也许可用于无线电广播系统。
These recordings will probably be used by radio broadcasting systems .
无线电广播是由录音制成的。
无线电广播是由录音制成的。
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