Therefore, structures must have certain reliability to make sure that they can satisfy each operational function in prescriptive period.
因此，工程结构应要求具有一定的可靠性，才能保证结构在规定的使用期内能够满足设计要求的各项使用功能。
For a long period in history, translation approach is prescriptive and source-text oriented.
长期以来，翻译研究一直是以原文为中心的规定性的研究。
The safety of equipment is the capability of accomplishing the stated functions safely and faultlessly in the prescriptive condition and period.
设备安全性是设备在规定的条件下和规定的时间内安全的、无故障的完成规定功能的能力。
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