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1.adapter n.适应者( one that adapts);适配器(an attachment for adapting apparatus for uses not originally intended) 词根记忆:来自adapt(v.使适应) 例:It has established itself as a supreme adapter in an era when the ability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals. 同根词：adaptive(a.适应的) 2.addict n.有瘾的人(person who is unable to stop taking drugs, alcohol,etc.) v.矿使上瘾，使入迷(to devote or surrender(oneself) to something habitually or obsessively) 词根记忆：ad（加强）+dict(说，要求)一不断要求一使上瘾 例:drug addict吸毒成瘾者//The level of caffeine in the candy bars is enough to keep people addicted. 派生词:addictive(a.使人上瘾的)；addiction(n.上瘾，沉溺) 同根词：dictator(n.独裁者)：contradict(v.反驳) 3.addictive a.上瘾的( causing or characterized by addiction) 词根记忆：来自addict(v.使上瘾，使着迷) 例:The phenomenon of withdrawal has always been the crucial physiological criterion for distinguishing addictive from nonaddictive drugs. 4.addition n.添加，增加物(a part added)；加法(the act or process of adding) 词根记忆：add(加)+ition 一加法 例:The addition of another firm has a negligible impact on the intensity of competition. | 
