cav-ing /'kervirj/ (also pot-hoMng) (both 6r£) {NAmE spe-lunk-ing) noun [U] the sport or activity of going into caves under the ground 洞穴探察：ffe had a丨ways wanted to go caving.他过去一直i探索洞穴。 cav-ity /'kaevati/ noun {pi. -ies) 1 a hole or empty space inside sth solid 洞；孔；窟窿；腔：the abdominaZ cavity 腹腔 2 a hole in a tooth (龋齿的）洞 cavity 'wall noun a wall consisting of two walls with a space between them, designed to prevent heat from escaping <有保暖f用知）空心墙，夹壁墙：cavity vvaH insuiarion空心墙隔热

ca-vort /ka'voit; NAmE ka'voirt/ verb [V +adv./prep.] to jump or move around in a noisy, excited and often sexual way欢跃；欢蹦乱跳；嬉戏；放荡地玩乐_：TTie photos showed her cavorting on the beach with her new Zover.这些照片展现了她和新情人在海滩上放荡嬉戏的 情景。

caw /ko:/ noun the unpleasant sound that is made by birds such as crows and rooks 鸦叫声；陌耳的叫声 ► caw ve吔[Vl

cay-enne /kei'en/ (also .cayenne 'pepper) noun [U] a type of red pepper used in cooking to give a hot flavour to food红辣椒 cayman = caiman

CB 7,si: 'bi:/ /?ow/7 [U] the abbreviation for ‘Citizens’ Band’ (a range of waves on a radio on which people can talk to each other over short distances, especially when driving)民用波段，民用电台频带（全写为Citizens’ Band，在短距离内，尤指驾车时可通话的无线电波段）：

A trucfc driver used his CB radio to caH/or heip.卡车司机 用民用波段无线电呼救。

CBE /,si: bi: 'i:/ noun the abbreviation for 'Commander (of the Order) of the British Empire* (an award given in Britain to some people for a special achievement) 英帝国高级勋位获得者，英帝.国司令勋衔获得者(全写为 Commander (of the Order) of the British Empire,英国授予 有特殊功绩的人的奖励）：He was made a CB£ in J995. 他在1995年被授予英帝国髙级勋位。◊ Jon Adams CB£ 英帝国高级勋位获得者乔恩•亚当斯 CBI /,si: bi: 'ai/ abbr. Confederation of British Industry (an important organization to which businesses and industries belong)英国卢业联合会 CBS I,si: bh 'es/ abbr. Columbia Broadcasting System (an American recording and broadcasting company that produces records, television programmes, etc.)(美 国）哥伦比亚广播公司

cc /,si: 'si:/ abbr. 1 carbon copy (to) (used on business letters and emails to show that a copy is being sent to another person)副本，抄送（用于為务书信和电子邮 件，表示剔本_时发送给另一人）：t〇iufcePeters，cc JcmetGoid寄卢克•彼得斯，抄送珍妮特•戈尔德 一 picture o page R7 2 cubic centimetre(s)立方厘米： an 850cc engine * 0.85 升发动机 CCRA /,si: si: a:r 'ei/ abbr. Canada Customs and Revenue Agency (the department of the Canadian government that deals with personal income tax, and with taxes on goods that are bought and sold)加拿大海关与税务局 CCTV /,si: si: ti: 'vi:/ abbr. closed-circuit television 闭路电视

CD 〇Tt /,si: 'di:/ (also disc) noun a small disc on which sound or information is recorded. CDs are played on a special machine called a CD player. CD is an abbreviation for ‘compact disc’•光盘，激 A唱 片，光碟（全写为compact disc )

CD-I /,si: di: 'ai/ noun 1 [U] a multimedia system which uses CDs that can react to instructions given by the user ( the abbreviation for ‘compact disc interactive’) 交互士光盘系统（全写为compact disc interactive, —种受 使用者指令控制的多媒体光盘系统）2 [C] the type of CD that this type of system uses 交互式•光盘 CD-R /,si: di: 'ai(r)/ noun [C, U] a CD on which information, sound and pictures can be recorded once only (an abbreviation for ‘compact disc recordable’）可』录光盘 (全写为 compact disc recordable,可作一次 刻录)•

Cdr (also Cdr. especially in US) abbr. (in writing) Commander (书写形式）海军中較，高级警官：Cdr (John) Stone (约翰）斯通警官

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CD-ROM (0r£) (L/S CD/ROM) /,si: di: Tom; _ra:m/ noun [C, ；U] a CD on which large amounts of information, sound and pictures can be stored, for use on a computer (an abbreviation for ‘compact disc read-only memory⁵)只读光盘存储器，只读光i (-全写为compact disc read-only memory ) ： The software package contains 5Q)-ROAfc.这个软件包由5个只读光盘组成。OThe encydopedia is avaiZaWe on CD-ROM 百科全书光盘已'上

.市。◊ a CD-ROM drive (= in a computer)只读光盘驱动 器 一 picture o page R5 — compare ROM

CD-RW /,si: di: cu 'dAblju:; NAmE ar:/ noun [G, U] a CD on which information, sound and pictures can be recorded and removed more than once (an abbreviation for ‘compact disc rewritable’）可重写A盘全写'为 compact disc rewritable )

CDT /,si: di: 'ti:/ abbr. 1 (fir£) Craft, Design and Tech- nology (taught as a subject in schools) X艺、设计与技 术.(学技科目）2 Central Daylight Time

CE /.si: 'i:/ flfck 1 (in Britain) Church of England 英国国 教太格兰圣_公会 2 (also C*E. especially in /NW/rj£) Common Era (= the period since the birth of Christ when the Christian calendar starts counting years). CE can be used to give dates in the same way as AD•基督 纪元，公元（表示日期时用法同AD) —compare AD, BC, BCE

Cease 0^ /sirs/ verb (formal) to stop happening or existing; to stop sth from happening or existing (使）停j|，终止，结束：[V] Welfare payments cease as soon as an individual starts a job•—旦就业，即停发福利救济。◊ [V to inf] Ybu never cease to amaze me/你总能让我感到惊奇！ ◊ [VN] TTiey voted to cease strike action I'mmedZatdy.他们投票&定立 即停止罢工。◊ He ordered his men to cease jre (= stop shooting).也命令手下停止射击。◊ [V -ing] The company ceased trading i’ti June•这秦公司已 T 六月停业。一see also cessation see wonder n.

cease-fire /'si:sfaia(r)/ noun a time when enemies agree to stop fighting, usually while a way is found to end the fighting permanently (通常指永久性的）停火，停战 H7?l truce : a caH /or an immediate cease/iire 要求支即 停火的呼吁◊ Observers have reported serious vfoZations o/thecease/i’re.观察员报告说停火协议遭到严重破坏。

cease-less /'siislas/ adj. (formal) not stopping; seeming to have no end不停品r (好像）无休止的，不断的

HTO CONSTANT, INTERMINABLE ► cease.less.ly fli/v.

cecum [NAm£) = caecum

cedar /'si:da(r)/ noun 1 [C] a tall evergreen tree with wide spreading branches 雪松 2 (also cedar.wood) [U] the hard red wood of the cedar tree, that has a sweet smell雪松木

cede /si:d/ verfc [VN]〜sth (to sb) (/brmo/) to give sb control of sth or give them power, a right, etc., espe- cially unwillingly 割让；让给；转{h: Cuba was ceded by Spam to the t/S m IS卯.古巴在1898年被西班牙割让 给美国。一see also cession

ce-dilla /si'dila/ noun the mark placed under the letter c in French, Portuguese, etc. to show that it is pronounced like an s rather than a /c; a similar mark under s in Turkish and some other languages 下加符，

下加变音符（法语、葡萄牙语等c字母下面加的符号，表 示发音像S而不像k; 土耳其语和其他一些语言中S字母 类似的符号）

cei-lidh /'keili/ noun a social occasion with music and dancing, especially in Scotland and Ireland (苏格兰、 爱^^兰有音乐舞蹈的）同乐会，社交集会

Ceil-ing tHf /'sirlnj/ noun 1 the top inside surface of a room 天花板；顶棚： She Zay on fter bacfc staring up at the celling•她仰卧着凝 视天在板。◊ a kzrge room rn.th a high cefZing 屋顶很 嵩的大房间 2 the highest limit or amount of sth 最高 限度；上限；最大限量：price ceih’ngs最髙限价 —compare floor(7) 3 (fechn/a// 术语）the greatest height at which a particular aircraft is able, to fly 最 高飞行限度；升限一see also glass ceiling ITBTW1 see hit v.