六级英语词汇天天背.pdf

六级词汇天天背abbr eviationn.缩写，节略；缩写形式abbr eviation for/of 的缩写abidev.遵守，坚持；忍受，容忍（常用与否定或疑问句）Abide by your pr omise.遵守你的诺言。She can t abide that man.她无法忍受那个人。词组abide by遵守，坚持abolishvt.依法废止、废除，革除Ther e ar e many bad customs and laws that ought to be abolished.有很多不良的旧习惯和法律应予以废除。反establishabsor ptionn.吸的,吸收过程；专注Complete absor ption in spor t inter fer ed with his studies.一心专注于体育运动妨碍了他的学业。absur dadj.不合理的、荒唐的、可笑的、愚蠢的。It was absur d of you to suggest such a thing.你竟提出这样的一件事，真可笑。同r idiculousabundancen.丰富，充裕live in abundance过着丰衣足食的生活an abundance of good things 很多好东西academyn.高等学府，专科学校；研究会，学院the Chinese Academy of Science 中国科学院acceler ationn.加速度，加速率，加速；促进，加快accessor yn.附件、附属品；同谋，帮凶the accessor ies of a bicycle 自行车的附件 an accessor y to a mur der er 一个杀人犯的同谋adj.附加的，附属的；同谋的，帮凶的accor dv.给予，赠予accor d sb.Per mission=accor d per mission to sb.允许某人同gr antv.（使）符合，（使）一致His actions accor d with his wor ds.他言行一致。n.一致，调和；（国家间的）条约、规定词组in/out of accor d with 与-致/与不一致of one s own accor d 自 动地，自发地He gave gener ously of his own accor d.他自愿慷慨解囊。With one accor d 整体一致地acknowledgevt.承认She r efused to acknowledge defeat.她拒绝承认失败。vt.表示感谢We must not fail to acknowledge his ser vices to the town.我们必须感谢 他对本市的贡献。vt.表示认识，向（某人）打招呼；告知（信件、礼物）的收到，确认acknowledge sb.s letter确认收到某人的来信vt.【律】公证acknowledge a deed公证一项契约难点感谢臬人通常不说acknowledge sb.常用acknowledge oneswith用 向某人的致谢He acknowledged the applause with a small bow.他鞠躬以谢欢呼。acknowledge后接动词的ing形式，不接动词不定式。He acknowledged having been fr ightened.他承认受惊。词组acknowledge ones defeat承认失败It is univer sally acknowledged that.是大家所公认的acknowledge the applause谢幕acknowledge the cor n美俚承认为事实，认输，甘拜下风acknowledge the super ior ity of自认不如acquaintvt.通知、告知I acquainted him with my plan.我把计划告诉他。同infor mvt.使认识，使熟悉We ar e acquainted with each other.我们互相认识。难点acquaint sb./oneself with使某人熟悉；把通知某人be acquainted with sb.与某人相识，了解become/get acquainted with 开始认识，开始了解adher evi.坚持，追随，依靠He adher ed to his decision.他坚持自己的决定。粘着Gum adher ed to her finger s.口香糖粘着她的手。同stick难点adher e to/stick to/cling to坚持拥护依靠;粘着adj acentadj.邻近的，毗连的同neighbor ingadj.前后相连的a music pr ogr amme adj acent to the news 紧接在新闻前的（或后）的音乐节目词组be adj acent to.临近；紧接在前（或后）的adj oinv.临近，毗连Mexico adj oins the United States.墨西哥与美国界临。adj ustableadj.可调节的，可校准的admir ationn.赞美，钦佩，赞赏He was lost in admir ation of the beautiful view.他沉醉在美丽的景色中。词组admir ation for对赞美,钦佩I have a gr eat admir ation for your wisdom.我非常钦佩你的智慧。adoptionn.收养；采用，采纳，正式通过the adoption of new r ules新规则的表决通过ador evt.崇拜，敬慕He ador es his teacher.他敬慕他的老师。同wor shipvt.极为喜欢I ador e swimming.我非常喜欢游泳。advantageousadj.有利的，有助的adver tisev.为做广告，登广告adver tise in all newspaper s 在所有报纸上登广告v.通知，告知adver tise sb.of one s plan告知某人自己的计划难点adver tise for sth.登广告征求（或寻找）某物adver tise sth为某物做广告advocaten.提倡者，拥护者an advocate of peace提倡和平的人同suppor ter辩护者，律师vt.拥护，支持；提倡；主张；建议；辩护同favor难点advocate后接名词、动名词，不接动词不定式Do you advocate keeping all childr en at school till the age of sixteen?你主张将义务教育延长至十六岁吗？aer ialadj.空气的，大气的aer ial cur r ents 气流adj.航空的aer ial stunts空中特技n.天线同（美）antennaaer ospacen.太空，宇宙空间affir mv.断言，肯定He affir ms his innocence.他断言自己是清白的。同asser tv.证实，批准The council affir med the decision.委员会批准了这项决议。agitationn.搅动，摇动；激动，忧虑She was in a state of agitation.她处于激动状态。n.鼓动，煽动agr eeableadj.令人愉快的She has an agr eeable voice.她的嗓音悦耳。同pleasantadj.易相处的R compatibleadj.（欣然）同意的Im agr eeable to doing what you suggest.我乐于照你的建议去做。alasint.（表示悲痛、遗憾等的惊叹声）哎呀，唉albumn.相册，集邮册，签名纪念册；唱片簿，唱片集aler tadj.警惕的，警觉的be aler t in answer ing questions 留心回答问题R watchfuladj.机灵的同clevern.注意，提防，小心They ar e always on the aler t for tr affic signals.他们总是很留心交通信号。n.警戒，警报，戒备状态难点be aler t to sth.警惕be on the aler t for/against sth/to do sth.警惕，随时准备着做algebr an.代数学，代数alienn.外国人，外侨同for eigneradj.外国的alien nationality 外国国籍adj.不同性质的，异己的，相异的难点be alien to/fr om-与相异或相反The pr inciples ar e alien to our r eligion.这些原则与我们的宗教相悖。Alignmentn.直线排列，队列The desks ar e in/out of alignment.桌子排成/没有排成直行。n.结盟，联合alliedadj.联合的，同盟的，联姻的；同源的难点be allied to.（指事物）与有关系，与同属一类The English language is allied to the Ger man language.英语与德语属于同一 语系。allowancen.津贴，补贴housing allowance 房贝占难点make allowance for考虑到，顾虑到We must make allowance for his youth.我们必须体谅他年轻。allyn.同盟国，同盟者；助手，支持者v.联盟，结合难点ally(oneself)with/to.与联盟，联姻Ger many allied itself with Italy.德国与意大利联盟。alongsidepr ep.在旁边11 besideadv.并排地，并肩地alter ationn.改变，变更同modificationalter natev.轮流，使交替发生We alter nate in cleaning the r oom.我们轮流打扫房间。adj.交替的，轮流的Tom and Har r y do the wor k on alter nate days.汤姆和哈里隔日轮流做这工 作。amateurn;业余爱好者，业余运动员.S.pr ofessionaladj.业余的an amateur painter 业余画家反pr ofessionalambassadorn.大使 the Br itish Ambassador to China 英国驻华大使ambientadj.周围的，包围着的同sur r oundingambiguousadj.模棱两可的，含糊的His answer was ambiguous.他的答复很含糊。同vagueambitiousadj.有雄心的，野心勃勃的；有强烈欲望的，炫耀的难点be ambitious of/for/to do sth 热衷于He is ambitious of/for power.他名（衷于权力。ampleadj.宽大的，宽敞的an ample r oom 宽敞的房间同spaciousadj.丰富的，富裕的ample food充足的食物同abundantadj.足够的，充足的Five dollar s will be ample for my needs.五美元将足够应付我的需要了。同enoughamplituden.广大，广阔，丰裕；（物）振幅amusementn.娱乐，快乐To the gr eat amusement of ever ybody,the actor s bear d fell off.使每个人都感到很好笑的是那演员的胡子掉下来了。11 enter tainmentn.娱乐品，游乐场所Ther e ar e plenty of amusements her e-cinemas,the at r es,concer ts,and s o on.这里有很多娱乐-电影院，戏院，音乐会等。analoguen.类似物同counter par tn.（语）同源词，对应词analogyn.相似，类似11 likenessn.比拟，类推，类比；类比论证难点bear/show an analogy to/with-具有（显示）与相似的特征dr aw an analogy between 在之间作比喻The teacher dr ew an analogy between the human hear t and a pump.老师把心脏比作一个泵。by/fr om analogy 用类推法 on the analogy of 根据类推analyticadj.分析的，分解的，用分析法的anniver sar yn.周年纪念日，周年纪念wedding anniver sar y 结婚周年纪念annuallyadv.每年,年年anoden.(电)阳极，正级反cathodeantar cticadj.南极的，南极区的the Antar ctic Qr cle 南极圈n.(the Antar ctic)南极区antennan.(pl.)antennae,antennas天线；同aer ialn.触角，触须antiquen.古董，古艺术品(the antique)古风，古代艺术风格appendixn.(pl.)appendices,appendixes附录，附属物two appendixes to a book 书的两个附录同supplementn.盲肠，阑尾applaudv.鼓掌欢迎，欢呼The audience applauded her singing.听众为她的歌唱鼓掌叫好。同cheern.赞扬，赞成I applaud your decision.我赞成你的决定。applausen.热烈称赞，喝彩，鼓掌be gr eeted with applause 受到鼓掌欢迎同pr aiseappr eciableadj.可估计的，可觉察的an appr eciable change in the temper atur e 可感到的气温变化同per ceptibleappr eciationn.鉴别，评价，欣赏She showed no appr eciation of good music.她对好音乐毫无欣赏能力。n.感激in sincer e appr eciation of your valuable help 由衷感激你宝贵的帮助。aptadj.易于，倾向于R inclinedadj.灵巧的，灵敏的an apt pupil聪明的学生|h quick-wittedadj.贴切的，恰当的嘘点be apt to do sth.有的倾向的，易于He is apt to for get people,s names.她易于忘记别人的名字。be apt at doing sth做橐事聪明的He is ver y apt at picking up a new subj ect.他很善于学习新科目。ar cn.弧；弧形物；（电）弧光ar chn.拱，拱门，拱形结构an ar ch br idge 拱桥同bowv.拱起，（使）成弓形Hor ses ar ch their necks.马拱起颈脖。V.用拱连接，横跨A br idge ar ches the r iver.桥横跨在河上。ar chitectn.建筑师；（喻）缔造者，设计师，创造者同founderar chitectur en.建筑学，建筑术；建筑物；建筑式样ar ct icadj.北极的，北极区的；极冷的an ar ctic wind 寒风ar r ayvt.部署（军队等）以备作战，列阵The soldier s wer e ar r ayed on the opposite hill.士兵被部署在对面山头上。vt.穿着，盛装ar r ayed like a queen 盛装如皇后同dr ess难点an ar r ay of 一大批，一系列ascendv.攀登，上升The air plane ascended into the cloud.飞机高高飞入云端。反descendv.追溯（to）ascer tainvt.查明，弄清，确定ascer tain wher e the tr ouble lies 弄清毛病所在同find outascr ibevt.把归于同attr ibute考点ascr ibe.to sth把归功于，归咎于，归因于They ascr ibe his success to good luck.=His success was ascr ibed to good luck.他们把他的成功归因于幸运。ashor eadv.在岸上，上岸go ashor e 离船上岸，登岸assn.驴；6onkeyn.愚蠢的人，固执的人同idiot难点make an ass of oneself 出洋相，做蠢事make an ass of sb.捉弄某人assassinatevt.暗杀同mur dervt.中伤，破坏（名誉等）assaultn.猛烈而突然的攻击They made an assault on the enemys positions.他们突袭敌人的阵地。R attackv.袭击，突袭同assail难点make an assault on/upon-攻击，袭击asser tvt.宣言，断言asser t one s innocence 声明自己的清白R declar evt.维护，主张，坚持同maintain难点asser t oneself坚持自己的权利，坚持己见assessmentn.估计，评估，估计数额Ini estimation难点make/take an assessment of对进行估计、评估 assumptionn.假定，假设同suppositionn.承由，担任the assumption of office 就职n.自负，傲慢难点on the assumption that 假定on the condition that 以为条件assur ancen.自信，把握，胸有成竹He answer ed all the questions with assur ance.他有把握地回答了所有的问 题。|s self-confidencen.承诺，担保，保证We had his assur ance that he would help us.我们得到他愿意帮助我们的承诺。同guar antee（律）不动产转让（证书）astonishmentn.惊奇，惊讶，惊愕To my astonishment,my money was gone.使我大吃一惊的是我的钱丢了。同gr eat sur pr isen.令人惊讶而事物 astr onomyn.天文学atmospher icadj.关气的，空气的，大气层的R aer ialadj.大气所引起的atmospher ic distur bances 大气干扰attachmentn.附属，附着，附带；附属物，附件；友爱，深情，爱慕have an attachment for sb.对某人怀有深情难点attachment to/for某物的附件；对某人爱慕；对某事忠诚;attachment to a cause对事业的忠诚 attendancen.看护，照料；到场，出席attendance at the meeting 到会n.出席的次数How many attendances has he made?他出席了几次？n.（与形容词连用）出席的人数a lar ge attendance at the meeting.到会的人多难点be in attendance on/upon sb.护理某人，侍候某人The maj or was in attendance upon the Queen.这少校担任女王的侍卫。attendantn.服务员，值班员，护理人员attor neyn.（美）律师同（英）solicitorn.（业务或法律j L的）代理人同agentauton.汽车vi.乘汽车 auto thr ough the mountains乘汽车经过山区automatevt.使自动化automate a plant使工厂自动化availv.有利（于），有助（于）Money does not avail on a deser t island.金钱在荒岛上毫无用处。同benefitn.（一般用于否定句中）效用，利益，帮助难点to no avail无效地，无结果without avail无效地，无结果avail sb.有利于某人Our effor ts availed us nothing.我们的努力均属无用。avail against对抵抗起作用Nothing availed against the stor m.没有任何东西可以抵御暴风雨。avail oneself of 利用You should avail your self of ever y oppor tunity to pr actise speaking English.你应该利用每一个机会练习说英语。availabilityn.可用性，有效性；可得到（利用）的东西或人aviationn.航空，航空学，飞行术axialadj.轴的；轴向的；axisn.（pl.）axes轴线，轴，中心线；（解）枢椎，第二颈椎axlen.轮轴，车轴the back axle of a bus公共汽车的后车轴bachelorn.单身汉，单身a bachelor gir l自食其力的未婚女子n.学士bechelor of Ar ts/Science 文/理学士baconn.咸肉，熏肉badgen.徽章，证章；标记，标志，象征；同symbol bafflevt.使困惑，难住The question baffled me.这个问题难住了我。同confusevt.妨碍，阻挠They succeeded in-fling the enemys attack.他们成功地阻止了敌人的进攻。vi.徒劳地挣扎；折腾baffle with the stor m徒然与暴风雨搏斗baitn.饵 live bait 活饵n.（喻）引诱物同temptation（旅途中）休息考点r ise to/j ump at the bait鱼吞饵；人入圈套balconyn.阳台；（戏院或音乐厅的）楼座，楼厅baldadj.秃的，无毛的，无叶的，无装饰的同bar eadj.（喻）单调的，枯燥的a bald style of wr iting 单调的文体同dullballetn.芭蕾舞剧；芭蕾舞剧演员总称a member of the ballet芭蕾舞团的一名演员the ballet芭蕾舞艺术bamboon.（pl.）bamboos竹子；竹杆，竹棍bandagen.绷带，包带vt.用绷带包扎bandage（up）a hand用绷带包扎手同bindbanditn.（pl.）bandits,banditti土匪，强盗，歹徒同outlawbankern.银行家；（赌场）庄家bankr uptn.破产者adj.破产的；枯竭的，失败的；完全缺乏的be bankr upt of humor 毫无幽默可言vt.使破产；使枯竭War had bankr upted the nations natur al r esour ces.战争已耗尽了那个国家的 自然资源。难点go bankr upt 破产be bankr upt in/of完全缺乏 banquetn.正式宴会give a banquet to sb.(或 in sb.s honour)宴请某人同dinnerbar elyadv.赤裸裸地，空乏地bar ely fur nished r ooms儿乎没有家具的房间adv.（仅仅）勉勉强强，几乎没有He bar ely escaped death.他九死一生。同har dly.scar cely bar gen.驳船；大游艇；（旗舰将官的）专用船vi.冲撞，碰撞（某人或某物）；笨重缓慢地移动vt.用驳船运载难点bar ge into/against-冲撞，碰撞bar ge in/into闯入，打扰，打断Stop bar ging into our conver sation.不要打断我们的谈话。bar leyn.大麦难点wheat小麦oat（pL）燕麦bar ometern.气压计，晴雨表 bar onn.贵族，男爵；工业巨商，大亨an oil bar on 石油大王bar r enadj.贫瘠的，不毛的bar r en land 不毛之地反fer tileadj.不育的，不妊的，（植物）不结果的同unfr uitfulbaseballn.棒球；棒球运动basementn.地下室bazarn.集市，市场同mar ketplacen.廉价商店beadn.有孔的小珠子；水珠，滴beads of sweat 汗珠v.用小珠装饰，把连成一串，结珠，形成珠状Sweat beaded up on his for ehead.他额上渗出点点汗珠。bear ingn.关系，方面What he said has no much bear ing on the subj ect.他所说的与本题没有太大关系。n.（常用复数）方位，方向；可忍耐限度，忍耐n.（常用复数）轴承beetlen.甲虫；近视的人befor ehandadv.预先，事先Please let me know befor ehand.请预先通知我。同in advanceadv.提前地adj.（一般作表语）预先准备好的；提前的，过早的难点be befor ehand with事先做好；提前When you go on a j our ney,its a good thing to be befor ehand with your p acking.你出门旅行的时候最好预先把行李包扎好。bestowvt.给予，赠予He bestowed the highest honor on the man.他授予那人最高的荣誉。难点bestow on/upon sb.授予某人bewar ev.当心，谨慎Bewar e of pick-pockets!当心扒手!同watch out难点bewar e of sth.当心bewar e主要用于祈使句或以不定式形式出现Bewar e of the dog!当心那只狗。He told them to be bewar e.他告诉他们要多加小心。bewildervt.使困惑，使张慌失措He was bewilder ed by her question.他因她的质问而不知所措。同confusebidn.报价，投标Will nobody make a higher/fur ther bid?再没有出更高的价吗？v.出价，投标(bid;bid)She bid 50 dollar s for the camer a.那个照相机她出价 50 美元。R offerv.吩咐，命令(bade;bidden)They bade him(to)leave ther e.他们命令他离开这里。同commandbishopn.主教 bitter nessn.苦味；辛酸，苦难Bear always in mind the bitter ness of the old society.牢记旧社会的苦难。Blacksmithn.铁匠，锻工blazen.火焰，火光同flamen.闪光，光彩，强烈的光the blaze of the sun 太阳的强光同glow（pl.）地狱Go to blaze!该死！v.发光彩，照耀The sun was blazing over head.太阳在空中照耀。v.（使）燃烧，（使）冒火焰难点blaze up勃然大怒；燃烧起来He was blazing up at an insult.他因受到侮辱而发怒。Blaze away连续射击；继续燃烧bleachv.（使）漂白；（使）变白bleached linen 漂白的麻blondn.金发白肤碧眼的人blousen.（妇女、儿童或水手穿的）短上衣，女衬衫blundern.大错commit a blunder 犯大错R mistakev.犯大错，失策Our leader s have blunder ed again.我们的领导人又犯了大错。v.乱闯，瞎闯blunder into a wall 瞎闯撞到了墙难点blunder away因愚蠢（或轻率）而失掉blunder on 一错再错；偶然碰上blushn.脸红，愧色She tur ned away to hide her blushes.她转身去掩饰她的脸红。v.脸红，羞愧；使呈红色难点blush with/for/at sth.因而脸红She blushed for/with shame.她羞愧得脸红。boilern.锅炉，热水器，烧水壶bour geoisadj.资产阶级的，中产阶级的，平庸的n.（单复同）中产阶级；资产家boycottn.（联合）抵制，拒绝put a boycott on sb.联合抵制某人vt.联合抵制，联合拒绝boycott smuggling联合抵制走私br acen.支柱，支架，支撑同pr opvt.支住，撑牢The str uts ar e fir mly br aced.那些支柱上得很牢固。同suppor tvt.振奋难点br ace up打起精神，振作起来He br aced himself up for the new task.他振作精神从事新任务。br eakdownn.（精神，健康）衰竭，衰弱Hes suffer ing fr om a ner vous br eakdown他正患神经衰弱。同failur en.损坏，失灵an electr icity br eakdown 断电同failur en.垮台，崩溃，破裂，失败a br eakdown of negotiations 谈判的破裂同failur ebr iben.贿赂offer br ibes to sb.向某人行贿accept/take a br ibe fr om sb.从某人处受贿v.贿赂，行贿br ibe a j udge贿赂法官同buy offbr idegr oomn.新郎br idlen.马笼头，马勒；束缚set a br idle on sbs power抑制某人的权力同boundvt.抑制，约束He tr ied to br idle his temper.他设法控制住脾气 同r estr ainbr ightnessn.光辉，明亮；亮度；聪明br iskadj.轻快的，活泼的，敏捷的at a br isk pace以轻快的步子同activeadj.兴旺的do a br isk business 买卖兴隆br ittleadj.易碎的，脆弱的同cr ispbr oadenv.放宽，变宽，（使）扩大His face br oadened into a gr in.他咧嘴而笑。同widenbr onzen.青铜；青铜色；青铜器br oodn.一窝（幼雏）同offspr ingv.孵雏，孵蛋；盘算，沉思1 meditate难点br ood on/over 思考;沉思She sat ther e br ooding on whether life was wor th living.她坐在刃K里沉思、是 否值得活下去。br uten.禽兽，畜牲同animaln.残忍的人Buddhismn.佛教，佛教教义budgetn.预算，预算案vi.预算（for）to budget for the coming year 为明年做预算buffalon.水牛；野牛bugn.虫，臭虫；窃听器vt.装窃听器于，通过窃听器窃听buglen.军号，喇叭v.吹号，吹号召集 bulln.公牛，雄兽；买空的政权投机商bulletinn.公告，告示a bulletin of news 新闻简报bumpn.航撞，撞击同clashn.肿块Ive got a bump on my head.我头上撞肿一块n.隆起物，（路面）凸块；v.碰（破）；撞（伤）bump ones head against sth.头碰在东西上bur eaucr acyn.官僚主义；官僚的总称 bur glarn.夜盗，窃贼；同thiefbur ialn.埋葬，葬礼a bur ial gr ound 墓地同funer aln.坟墓；弃绝 bur nern.以烧为业的人a br ick bur ner烧砖工人n.燃烧器，炉子，灯头，煤气头 busheln.蒲式耳（谷物计量单位；美国Winchester bushel=35.238升，英国Imper ial bushel=36.368 升）难点hide oneslight candle under a bushel不露锋芒measur e other peoples cor n by ones own bushel以己度人buttv.抵触，碰撞butt against a tr ee in the dar k 黑暗中撞在树上V.（口）插嘴，介入，打扰May I butt in?我可以打个岔吗？n.（盛酒或水的）大桶buzzn.嗡嗡声，（蜂鸣器发出的）营营声v.（使）嗡嗡响；急速或兴奋地活动buzzing along the r oad 沿路急急而行难点buzz about/ar ound匆匆忙忙地来来去去buzz off匆匆走掉或挂断电话bypassn.旁路；（机）旁通管；（电）分路器vt.走旁路，迂回，环绕，避开Lets bypass that pr oposal.我们别理那项提案了。by-pr oductn.副产品calculusn.（pl.）calculuses;calculi（数）微积分；计算；（医）结石calibr ationn.刻度；校准，标定，口径测量canen.（竹等）茎；藤料，竹料a cane chair 藤椅n.手杖，竹杖；capabilityn.能力，才能；潜在才能The boy has gr eat capability.那男孩有很大的潜能。难点capability to do sth.=capability of doing sth.做某事的能力capability for doing sth.看的可能capability for being impr oved 有可能改进capacitancen.（电）电容，电容量capacitorn.（电）电容器 capen.岬，海角the Cape of Good Hope 好望角n.披肩，斗篷captiveadj.被俘的，被监禁的They wer e taken captive.他们成了俘虏。adj.被迷住的car toonn.漫画，动画片，连环画car tr idgen.弹药筒，子弹；胶卷盒；（一卷）胶卷catalystn.触媒，催化剂；刺激（或促进）因素categor yn.种类，类别同classn.（哲）范畴catervi.迎合，投合（for/to）v.（为）供应酒菜cater a banquet 承办酒席难点cater for 7to 迎合TV pr ogr ammes usually cater for all tastes.电视通常提供各种不同趣味的娱 乐节目。Catholicadj.天主教的；广泛的，普遍的n.天主教徒cautionn.小