ADJ If something is defective, there is something wrong with it and it does not work properly. 有缺陷的
如果某件東西是defective(有缺陷的)，意思是它出了問題，不能正常工作
2 Deficient
ADJ If someone or something is deficient in a particular thing, they do not have the full amount of it that they need in order to function normally or work properly. 缺乏的; 不足的 [正式] 突出不足
如果某人或某事在某壹特定事物上有缺陷，他們沒有獲得他們正常工作或正常工作所需的全部量