By an example of a reversibly running mechanic-electric-hydraulic-system, the generalized secondary control system was analyzed, whose general properties were summarized.

结合工程实践，以可逆运行的机—电—液系统为例，对广义二次调节概念进行了深入分析，研究了二次调节系统的一般特征。

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For example, Subversion, the source code control system, provides a number of secondary commands that you type in addition to other arguments.

例如，源代码控制系统Subversion提供了许多二级命令，您在输入其他参数之后另外输入这些命令。

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Weighing body includes loading device and weighing device, while weighing and control system includes weighing sensors and secondary instrumentation.

秤体包括加料装置和称量装置，称量控制系统主要包括称重传感器和二次仪表。

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Given the two red flags that had been thrown up previously, one would have expected that as a precaution a cement plug would have been placed somewhere in the wellbore as a secondary pressure seal before this primary pressure control system (heavy mud) was evacuated from the wellbore.

WSJ: The Oil Disaster Is About Human, Not System, Failure