安全工程专业英语
Translation -paragraph 3Development—The design is now mature and the system is constructed. As every engineer knows, there can be various iterations back and forth between the detailed design and development phases.iteration back and forth n.反复；〈统计〉迭代
来来往往地, 来回地
开发阶段——现在设计已经成熟，系统已经建立。 正如每个工程
师所知，在详细设计和开发阶段可能 会出现来回地多次反复。-----English Engineering-----------English for Safety Engineering-------