fraction defective

基本解释

Improve existing products, fraction defective decrease more than 80% within one year.
改進現有産品，一年內質量不良率下降80%以上。
Officials have pointed out that the number of defective Chinese exports is just a fraction of the total shipped each year.
有關官員指出，存在缺陷的産品在中國每年出口的所有産品中所佔的比例微不足道。
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.
在家蠶母蛾微粒子病抽樣檢查時，應採取逐日分層抽樣方法，以提高送檢樣本對全批毒率的代表性。