In an ADSL system, transmitted data are organized and overhead data are inserted to form the frame and superframe before the process of modulation.

在ADSL(非对称数字用户线)系统中，传输的数据在进行调制以前，需先进行组织并加入开销数据后形成帧和复帧。

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DEMODULATION, The process of retrieving information (modulation) voltage from a modulated carrier voltage.

解调，从载波电压中获得调制电压的处理过程。

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Structure and the working process of a remote control vehicle for target towing were presented. Methods of control in automatic gear shifting and engine speed modulation were described.

本文介绍了遥控驾驶靶车牵引车速度控制系统的组成和工作过程，阐述了车辆自动换档和发动机转速调节的控制方法。

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