specifications should be focussed – use given-when-then, don’t explicitly detail all the dependencies, put defaults at the technical layer but don’t rely on them
需求说明要集中，使用“given—when—then”模式，不要特意细节化所有的依赖，可在技术层使用默认值，但不要依赖它们。
Jacket ball valves shall be able to work norm ally under all field conditions specified in the technical specifications.
夹套球阀应能在本技术规格书规定的所有现场条件下正常运行。
The quality of the goods acquired is of Paramount importance to all agencies, each of them procuring items based on their own technical specifications to which suppliers must adhere.
被采购商品的质量对所有的机构来说都是极为重要的。这些机构所采购的每一个物品都是以它们自己的技术规范为基础的，供应商必须遵守这些规范。
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