有时，一旦把CPU使用其它外围设备所必需的总线逻辑和延迟时间考虑在内，那么快速而廉价的CPU也可能变得昂贵。
Sometimes a fast, inexpensive CPU can become expensive once bus logic and the delays necessary to make it work with other peripherals are considered.
使用者与逻辑总线进行通信，而后者跟踪来自提供者的可用服务，并负责调用恰当的提供者。
The consumers communicate with the logical bus, which keeps track of the available services from the providers, and in turn calls the appropriate provider.
服务集成总线(SIB)是一个逻辑概念。
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