defective(a.) merriam-webster dict. a : imperfect in form or function : faulty <a defective pane of glass> b : falling below the norm in structure or in mental or physical function <defective eyesight> 2: lacking one or more of the usual forms of grammatical inflection <must is a defective verb> oxford dict. having a fault or faults; not perfect or complete [Synonym] faulty deficient(a.) merriam-webster dict. 1: lacking in some necessary quality or element <deficient in judgment> 2: not up to a normal standard or complement : defective <deficient strength> oxford dict. 1. not having enough of something, especially something that is essential <a diet that is deficient in vitamin A> 2. not good enough <Deaf people are sometimes treated as being mentally deficient.> deduct(v.) merriam-webster dict. 1: to take away (an amount) from a total : subtract 2: deduce, infer oxford dict. to take away money, points, etc. from a total amount [Synonym] subtract subduction merriam-webster dict. : the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another ※ 引述《bestthing ()》之铭言： : 请问 defective 跟 deficient这两个字同义吗？ : 字典上查两个字都有 "缺陷的"意思 : 请问这两个字是相等的吗? : 另外还有 : deduct 跟 subduct 这两字要怎麽判断什麽时候用呢??? : duduct 扣除，减除 : subduct 除去，减去，抽去 : 意思一样吗?? : 万分感谢!!!! --

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