十八、以S开头的核心词汇sack 麻袋，纸袋，塑料袋 a ～of cementsacred 神圣的the ～ name of God sacrifice 献祭，供奉 a law banning the ～ of animalssalute 敬礼，祝贺 ～ one’s superior officerscan 细看，审视 ～ the doctor’s face for a sign of hopes
十七、以R开头的核心词汇rack 架子，支架，搁架 a clothes ～ radiate（光，热等）辐射，发射 The sun ～s light and heat radical 根本的，基本的a ～ errorrake （长柄）耙，耙机，耙状物 an oyster ～ rally 集合，团结 ～ public opinion in favor of price controlsrandom胡乱
十六、以P开头的核心词汇pace 步，步速，步伐 He took three ～s forwardpad 垫，衬垫 a seat ～pant 气喘，气喘吁吁地说话 He ～ed along beside the bicycleparallel 平行的 The road is ～ to the riverparalyze 使瘫痪，使麻痹 A stroke ～d half his facepartia
十五、以O开头的核心词汇objective 目的，宗旨 political ～soblige 强迫，迫使 In certain countries the law ～s parents to send their children to schoolobscure 晦涩的，费解的 an ～ textobsolete 废弃的，淘汰的 Wooden warships are ～.obstinate 顽
十四、以N开头的核心词汇narrate 叙述，讲述 ～ the story of sb’s lifenasty 龌龊的，肮脏的 a～ roomnecessitate 使成为必须，需要 The emergency ～d a change in plans.necessity 必要（性），（迫切）需要 There is no ～ for disappointment.neglect 忽视，忽略 ～ o
十三、以M开头的核心词汇macroscopic肉眼可见的magnet 磁铁，磁铁石 The pin was extracted with a magnetmagnify 放大，扩大 I want to magnify this picturemaintain 维持，保持 maintain law and ordermalfunction 发生功能障碍，发生障碍 If the computer ma
十、以J开头的核心词汇justify 证明。。。正当或有理,正确：Such behavior is justified on these grounds十一、以K开头的核心词汇knit 编织，编结：She’s knitting her husband a sweater十二、以L开头的核心词汇label 标签，标记，标号：put labels on your luggagelag 走得慢，落后，滞
九、以I开头的核心词汇identical 同一的：the same (very)identical menuidentify 识别，鉴别：He identified the coat as his brother’s idle 闲散的，闲置的：idle moneyignite点燃，使燃烧：ignite a stove fire with scraps of paperilluminate 照明，照
八、以H开头的核心词汇hail 欢呼，喝彩：The crowd hailed the actress with joyhalt (行进中的)暂停前进，中止，终止：The car came to a sudden halthamper 妨碍，阻碍：hamper sb from getting electedhandicap 障碍，不利条件：Poor eyesight is a handicap to
七、以G开头的核心词汇gallop (马等的)飞跑，疾驰：The horse did a fine gallop during the racegamble赌博：gamble at cardsgasp 喘气，喘息：speak between gaspsgear齿轮，传动装置，(排)档：interlock cogs and gearsgeneralize 归纳，概括:I don’t think yo