本机传输速率超过SCSI总线速度的50%的驱动器必须在专用SCSI总线上，以避免降低性能。

Drives whose native transfer rate exceeds 50 percent of the SCSI bus speed must be on a dedicated SCSI bus to avoid loss in performance.

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介绍了电子转移的一些基本机理，着重介绍了本文所用到的有关自交换电子转移活化模型及计算耦合体系电子转移速率的理论框架。

Some basis mechanics, especially the activation model and the theoretical expression of the electron-transfer rate used in this paper have also been introduced.

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