直接交流不包括非同步性的网路课程或是非现场型式的聊天室。直接交流的关键要素在于现场的语音互动。

Direct interaction does not include "asynchronous" cyber courses or chat rooms where live voice interaction does not occur. The key element of direct interaction is live voice interaction.

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介绍了现场CAN总线通讯以及在同步发电机励磁控制系统中的运用，并具体给出了利用AT 89 C 52单片机和CAN控制器s JA 1000实现CAN接点通信的方法。

The scene CAN bus communication and its application to excitation system of synchronous generator was introduced, and the use of SBC AT89C52 and controller SJA1000 to realize junction communication.

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台架实验和现场试验均表明：改进同步带的齿形设计可以达到降低传动噪声的预期目的。

Site and bench tests show that the improvement in the design of tooth form has a significant effect on noise reduction.

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