225 sacrifice 牺牲
词根： -sacr- 神的
变形：sacr,secr,sanc,sanct
（5）.sanctuary 圣堂,庇护所
记忆方法：sanct(神的)+uary(场所)→神圣的场所
实例：The park is the largest wildlife sanctuary in the US.
（6）.consecrate 把…奉为神圣
记忆方法：con(一起)+secr(神)→一起看做神圣
实例：When a building, place, or object is consecrated, it is officially declared to be holy. When a person is consecrated, they are officially declared to be a bishop.
226 serve 服务
词根： -serv- 服务
变形：serv,serf
（1）.servile 奴性的
记忆方法：serv(服务)+ile(容易的)→容易服务人的→奴性的
实例：He was subservient and servile.
（2）.subservient 卑躬屈膝的
记忆方法：sub(下)+serv(服务)→在下面服务→卑躬屈膝的
实例：He was subservient and servile.
（3）.serfdom n.农奴制；农奴地位
记忆方法：serf(服务)+dom(=state 身份,状态)→ 农奴地位
实例：Now the savage system of serfdom in Xizang has been eliminated.
（4）.servitude n.奴役(状况)
记忆方法：serv(服务)+itude(表名词,… 状态)→服务他人的状态=被他人奴役
实例：1. They may grant you power, honor, and riches but afflict you with servitude, infamy, and poverty.
2.The criminal was sentenced to five years' servitude.
（5）.observance 遵守，奉行； (宗教的，正式的)仪式；庆祝
记忆方法：ob(加强)+serv(保持)+ ance(名词后缀)→ 一直保持=遵守, 奉行 近义词: observe 作为动词,除了'观察'之意外，也有遵守，庆祝等之意。因此observance 是observe此层意思对应的名词；对应观察意义的名词是observation,而observatory是天文台的意思。
实例：1.The trading day is shortened in observance of the Labor Day Holiday.
2. Observance of law is a matter of Principle for us.
227 1. sole,单独的; 2. solar,太阳的;
词根： -sol- "1. 单独; 2. 太阳;"
（1）.solitude 独居(尤其是平静而愉快的)
记忆方法：sol(单独)+itude(表状态)→单独居住的状态
实例：He enjoyed his moments of solitude before the pressures of the day began.
（2）.console 安慰
记忆方法：con(共同)+sol(太阳)→共同给人太阳→安慰
实例：He will have to console himself by reading about the success of his compatriots.
（3）.solace 安慰
记忆方法：
实例：He was inclined to seek solace in drink.
（4）.insolate 暴晒
记忆方法：in(进入)+sol(太阳)+ate→暴晒
实例：You need to insolate it in the sun to disinfect.
（5）.disconsolate 孤独的,郁郁寡欢的
记忆方法：dis(不)+consol(安慰)→无人安慰→孤独的
实例：He did not have much success, but tried not to get too disconsolate.
（6）.obsolete 过时的,老旧的
记忆方法：ob(不再)+sol(太阳)+ete→很久没有见到太阳(被搁置在储物柜中)→老旧的
实例：So much equipment becomes obsolete almost as soon as it's made.
（7）.solemn 庄严的，严肃的
记忆方法：sol(太阳)+emn→ 人类一直有对太阳的崇拜 另一个记法:solemn 读音似 '所罗门' 衍生: solemnity n.
实例：He was a slim, solemn, darkly handsome young man.
（8）.soliloquy n. 自言自语,独白
记忆方法：sol(单独)+loqu(说)+y→一个人说
近义词: soliloquize vt.
实例：Hamlet's soliloquy is probably the most famous in English drama.
（9）.solo adj./adv.单独的;独唱的;独奏的n. 独奏
记忆方法：sol(单独)+o(音乐术语)→ 独奏→ 单独的
实例：He had just completed his final solo album.
228 sum 总和
词根：sum 总和
（1）.consummate 使完美(vt),完美的,技艺高超的
记忆方法：con(共同)+sum(总和)→一起结合形成完美的
实例：consummate skills
229 evolve 进化
词根： -volve- 旋转
（1）.convolute 卷绕
记忆方法：con(共同)+volut(旋转)→卷绕
近义词: convoluted 盘绕的,复杂的
实例：The argument is rather convoluted.
230 robust 强壮的
词根： -robor- 力量
（1）.corroborate 证实,支持
记忆方法：co(共同)+robor(力量)+ate→支持
实例：I had access to a wide range of documents which corroborated the story.
难记词
260.conundrum 谜题
记忆方法：联想记忆: con(共同)+und=under+drum→在鼓下面→谜语
近义词: riddle, enigma
实例：Interaction designers often face the conundrum of whether to make their products user - customizable.
261.coquetry 卖弄风情,调情
记忆方法：联想记忆: co(共同)+quet=quiet→共同在安静的地方→卖弄风情 衍生: coquette(卖弄风情的女子)
实例：The moment she met a man she would play the coquetry.
262.cornucopia 丰饶角(羊角中装满水果鲜花以示丰饶),丰富
记忆方法：联想记忆: corn(角)+u+copia=copious(丰富的)→丰饶角
实例：Secondly, it is often argued that farm workers are compensated for their low wages by a cornucopia of payments in kind.
263.coronary 冠状的
记忆方法：联想记忆: co(共同的)+ron(发音类似"荣")+ary→共同的荣誉→冠装的, coronary arteries 冠状动脉
实例：If all the coronary arteries are free of significant obstructions, all parts of the heart will receive equal amounts of oxygen.
264.coronation 加冕礼
记忆方法：联想记忆: co(共同的)+ron(发音类似"荣")+ation→共同的荣誉→加冕礼
实例： ...the coronation of Her Majesty Queen Elizabeth II
265.corrugate 使起皱纹
记忆方法：联想记忆: cor(共同)+rug(小块地毯)+ate→变得像地毯一样起褶皱→使起皱纹
实例：The wind corrugates the surface of the sea.
266.coterie (志趣相投而排外的)小集团,小团体
记忆方法：cote(屋子)+ie(小东西或人)→一个屋子里的人→伙伴,小团体
实例：The songs he recorded were written by a small coterie of dedicated writers.
267.crack 裂开
记忆方法：常见于电脑crack a softward(黑掉一个软件)
近义词: crevice
实例：Concrete is liable to crack in very cold weather.
268.crafty 狡猾的
记忆方法：craft(技术,手艺)→技术好了,就狡猾了
实例：He is a crafty, lying character who enjoys plotting against others.
269.cramp 痉挛,变得狭窄
记忆方法：联想记忆: cram(塞满)+p→塞满后→变得狭窄,而特别的,胃被塞满后就容易痉挛 衍生: cramped 痉挛的,难懂的
实例：muscle cramp
