fraction defective

基本解释

Improve existing products, fraction defective decrease more than 80% within one year.
改进现有产品，一年内质量不良率下降80%以上。
Officials have pointed out that the number of defective Chinese exports is just a fraction of the total shipped each year.
有关官员指出，存在缺陷的产品在中国每年出口的所有产品中所占的比例微不足道。
So it is considered that we should adopt the method of day-to-day sampling to heighten the representation of the testing moths to lot fraction defective.
在家蚕母蛾微粒子病抽样检查时，应采取逐日分层抽样方法，以提高送检样本对全批毒率的代表性。