Changes are always occurring, and if actions are not taken, the important process variables-those related to safety, product quality, and production rates-will not achieve design conditions.

变化总是会出现，此时如果不采取相应的措施，那些与安全、产品质量和生产率有关的重要变量就不能满足设计要求。

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Among the micro-economics, resource demand and re-allocation process between the supplier, the price is one of the important variables.

在微观经济学之中，资源在需求和供应者之间重新分配的过程中，价格是重要的变数之一。

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Fault diagnosis is an important task for the chemical process, and the efficiency of the diagnostic approach depends critically on the location of sensors monitoring the process variables.

故障诊断是化工企业安全生产中一项重要的工作，其诊断方法的效率主要取决于监视过程变量传感器的配置。

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