mid-14c., from Middle French défectif (14c.) and directly from Late Latin defectivus, from defect-, past participle stem of deficere (see deficient). A euphemism for "mentally ill" from 1898 to c. 1935. Related: Defectively; defectiveness.
权威例句
1. A manufacturer negligently made and marketed a car with defective brakes.
某厂家由于疏忽,制造并销售了一款刹车系统存在缺陷的汽车。
2. Retailers can return defective merchandise.
零售商可以退回有缺陷的商品。
3. Her sight was becoming defective.
她的视力开始出现问题。
4. Her hearing was found to be slightly defective.
经检查,她的听力有点缺陷。
5. The building was destroyed when the defective boiler exploded.