安全工程专业英语
Translation -paragraph 3Test and evaluation—Once the system is built, it must be tested and evaluated. If serious problems still exist, the product can go back to the design and development phases. 测试和评估阶段——一旦系统建立，就必须进行测试和评估。 如果仍然存在严重的问题，那么产品将回到设计和开发阶段。 Production—The system or product now enters the manufacturing phase. 生产阶段——现在系统和产品进入制造阶段。
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