评估小部件使用的是MVEL表达式语言。
For evaluating the widgets, it USES the MVEL expression language.
可通过故障树分析及评估控制系统部件失效所产生的影响，确保始终维持安全状态。
A fault tree can be developed to evaluate the impact of the failure of a control system component and to ensure that safe conditions are maintained.
检查是为了确定和评估部件目前的状态。
Inspection is used to ascertain and assess the current status of a component.
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