defect/defective

defect /ˈdi:fekt, diˈfekt/ I. n.［c］ 缺点，毛病，瑕疵：an intellectual defect 智力上的缺陷；a hearing (physical )defect 听力（ 生理）毛病；a social defect 社会弊端；some defect in eyesight 视力不好 ‖II. vt. 叛国，背叛：He defected to the Soviet Union after the war.战后他叛逃到了苏联。

［辨析］与fault, flaw⁶和shortcoming辨见fault

defective /diˈfektiv/ adj.有错误的，有缺陷的；有瑕疵的：Her vision is seriously defective. 她的视力有严重缺陷。If the goods prove defective, the customer has the right to compensation.如果货品证明有缺陷，顾客有权索赔。