To avoid interfering by work, data were sampled through a multi-layers network which synthesize the field-bus and Ethernet and center on programmable logic controller.

为了排除人为干扰、提高可靠性，采集数据以可编程逻辑控制器为核心，通过现场总线和以太网的多层网络传送至数据库中。

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It is a common problem for the designer to exchange data in different layers and use which kind of granularity in multi-layers architecture software system.

在多层架构的分布式软件系统中，如何在层间交换数据，采用何种粒度的对象交换数据，是系统构建时经常遇到的问题。

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Therefore, the database system performance tuning and optimization, involving multi-layers, are vital for the whole system to be in normal operation.

因此，基于数据库系统的性能调整与优化对于整个系统的正常运行起着至关重要的作用。

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So each of these complex, multi-layered sources in each one of them you can find different layers each one possesses its own emphases, its own agenda, its own perspectives. Sometimes they complement one another.

因此每一个复杂多层次的来源,你可以在每一个中找到不同层面,每一个都有它要强调的东西，它自己的安排，及它自己的视角，有时候它们相互补充。

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The free market decided his success and not multi national layers of governing and controlling agencies.

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"We've looked at multi-layers already, " he says.

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Since they are built on to a flat wafer, rather than etched out of it, layers of vertical transistors could even be constructed on top of one another, raising the intriguing possibility of multi-storey semiconductors.

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