1. Retailers can return defective merchandise. 零售商可以退回有瑕疵的商品。
2. Her hearing was found to be slightly defective. 经检查，她的听力有点缺陷。
3. A manufacturer negligently made and marketed a car with defective brakes. 一家制造商渎职，制造并销售了一款有制动缺陷的汽车。
4. Dozens of animals have been cloned since that first lamb—mice, cats, cows and, most recently, a dog—and it's becoming increasingly clear that they are all, in one way or another, defective. 自从第一只羊被克隆以来，已经有几十种动物被克隆了，包括老鼠、猫、牛和最近的一只狗；而且越来越明显的是，这些动物都有这样或那样的缺陷。
5. Poor digestion can be caused by defective mastication of the food in the mouth. 消化不良可能是因为嘴里的食物没有完全嚼碎而引起的。
