安全工程专业英语
Translation -paragraph 3Operation—The system performs its intended function. 运转阶段——系统按其预定的功能运行。 Modification (optional )—Sometimes the product or system must be changed due to design or operation deficiencies that were not identified earlier. 修改阶段(可选择，(非必须))——有时由于某 些早期未识别出的设计或运行中的缺陷，产品或系 统必须加以修正-----English Engineering-----------English for Safety Engineering-------