• For example, a telephone call may travel by means of copper wire, fiber-optic cable, and radio waves as the call is sent from sender to receiver.

    例如电话中的通话讲话传送到听话人,其间可能通过铜线光缆无线电波进行传输。

    youdao

  • A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear.

    耳机一种传递电子信号设备比如电话立体声广播接收器上传出可声音。这种设备嵌到耳朵或耳朵里。

    youdao

  • A device that converts electric signals, as from a telephone, stereo, or radio receiver, to audible sound and fits over or in the ear.

    耳机一种传递电子信号设备比如电话立体声广播接收器上传出可声音。这种设备嵌到耳朵或耳朵里。

    youdao

$firstVoiceSent
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