The science and technology at the time the product is put in circulation is at a level incapable of detecting the defect.
将产品投入流通时的科学技术水平尚不能发现缺陷的存在的。
The science and technology at the time the product was put in circulation was at a level incapable of detecting the defect.
将产品投进流通时的科学技术水平尚不能发现缺陷的存在的。
It is widely recognized 1 that the cost of detecting and correcting a defect in the coding phase can be five to ten times higher than the cost of doing so during the requirements development phase.
已经被普遍认识到的是：1在编码阶段检查并修正一个缺陷的成本比需求开发阶段这样做的成本要高五到十倍还不止。
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