from the engine to help the driver change direction

动力转向系统

power-up noun 1 [U] the moment when a machine is switched on and starts working (机器的）启.动； '幵机： Does the computer beep on power-up?电脑开.机时发-出 “哔”的响声吗？： 2 [C] in computer games, an advan­tage that a character can get if a player wins a certain number of points, for example more strength 威力升级 (玩电脑游戏者贏得一定点数时人物获得力量提升等） power user noun {computing if) a user who needs computer products which are fastest and have the most features计算彳&高要求用户

power walking noun [U] the activity of walking very quickly as a form of exercise (为锻炼而进行的）快走，

秦走

pow wow /'pauwao/ noun 1 a meeting of Native Americans帕瓦仪式（美洲土著一种盛宴和舞蹈仪式）

2 (informal or humorous) a meeting for discussion

会；议事会’

pox /poks; NAmE pa:ks/ noun the pox [sing.] (oW use) "I an infectious disease spread by sexuai contact 梅毒 H77I SYPHILIS 2 = SMALLPOX poxy I'puksi; NAmE 'parksi/ adj. [only before noun] (BrE, if sb describes sth as poxy，they think it has little value or importance无价{I的；无足轻重的；鸡毛 蒜_皮的

ppaW?r. 1 pp. pages 页；页码：See 即• 20〇-1】7.参阅第 i〇0-117 页。2 (also p.p.) (esp«:/fl〃y 8r£) used in front* of a person’s name when si) signs a business letter on his/her behalf (信末署名时置于另一人的名字前，表示 代其发函.）：pp Chris Bafcer (= from Chris Baker, but signed by sb else because Chris Baker is away)代表克 里斯•贝克 3 (wws/’c 音')very quietly (from Italian ‘pian­issimo’) 极轻柔地，很弱 （源于 i 大利语 pianissimo ) ppi I,pi: pi: 'ai/ abbr. (computing if) pixels per inch (a measure of the quality of images)(图像质量度量单位 f 每矣寸像素

PPO /,pi: pi: 'au; NAmE 'ou/ abbr. (L/S) preferred-provider organization (a company that provides medical treat­ment for large organizations such as insurance com- panies and employers)首选医疗服务提供机构（为大机 构和雇丰提供医疗服务的公g)

PPS /,pi: pi: 'es/ noun the abbreviation for Parliamentary Private Secretary5 (a Member of Parliament in Britain who is given the job of helping a minister)议会私人秘书 (全写为 Parliamentary Private Secretary，协助各大臣工 作的议员）

PPV /,pi: pi: 'vi/ abbr. pay-per-view PR /,pi: 'a:(r)/ noun [U] 1 the abbreviation for public relations 公;关，公共关系（查写为 public relaticms ): a PK department/agency/campafgn 公关部 / 机构 / 运动 ◊ rhe arride is very good PJR /or the theatre..Si文章★ 助于加强该剧院必公共关系。2 the abbreviation for PROPORTIONAL REPRESENTATION 比例代表制（全写为 proportional representation )

prac-tic<able /'praektikabl/ adj. {format) able to be done; likely to be successful 可行的；行得通的 HTfTl feasible, workable ： at the earliest practicable oppor- tum’iy在尽：可能早的时机◊ as soon as⑻practicable 0 The only practicable alternative is to postpone themeert叩.另外唯一可行的办法就是推迟会期。◊ Employers should provide a safe working environment, as 两广也is reaso/iaWy pracriiJCriWe.、’诗要.条停许苛:卜!雇圭就 须辑供安全的叾痄环境。一compare IMPRACTICABLE ► prac-tic-abil-ity /.praektika'bilati/ noun [U] ： We were doubtful about the practicability of the plan.

■个计划是否切实可行。？rac.tic.ably7-abli/c^v.: PZease repZy as soon cw. is+pmcticaWypossiWe.请运早.回复。 prac-tical /'prasktikl/ adj., noun ■ adj.

► CONNECTED WITH REAL THINGS 寘实 1 connected with real situations, rather than with ideas or. theories 实际 的；真实的；客观存在的：to have gat'neci practiced experience 〇/ the work i 获得实际:工作经验◊ practical advfce/hdp/^support 切实初忠肯/ 帮/支声◊ pracricaZ probZems 实际.问题◊ T^iere are some obvi'oiis practical applications 〇/the research.这项研究有。些明i的实际 _途。◊ /n practicai terms, it means spending-Zess.具

体点说，那意味着少花些钱。◊Fromapracrtca!point 〇/ view, it isn’t a good pZace to Zive. ■实际一点看，这里不癌 理想的住处。一 compare THEORETICAL

►                 LIKELY TO WORK 可行 2 (of an idea，a method or a

course of action 想法、方法或行动）right or sensible; likely to be successful 切赤可行^  workable： It

wouldnyt be practical for us to go all that way just for the weekend.我们跑那么远只为了去度个周末实在很不切实

际。IMPRACTICAL

►                 USEFUL’有.用 3 (of things 东西）useful or suitable 有用 的；适用的：a practical HttZe car, idea〖 /or the .city 通想 的城市实用小汽幸pun IMPRACTICAL

►                 SENSIBLE 4 (of a person 人）sensible and realistic 明 智的；_实事求是的：let’s be pracricai and uwfc out the cost)iin;t.咱们实际一点儿，先计算一下成本费用。EH3 IMPRACTICAL

►                 GOOD AT MAKING THINGS 长于制作 5 (of a person 人） good at making or repairing things 心灵手巧由；善于制 作（或修补）的 handy： Bob's very practical. He does oW t/ie odd jofes aroimd the house.鲍勃心灵手巧，

家里的零活他都包了。

►                 ALMOST TOTAL 几.乎全部 6 [on丨y before noun] almost complete or total 几乎完i的；实#上的 HEI virtual: She /narried a pracricarstrcmger.她等于是嫁 了个陌

生人。

IT»!B1 for (all) practical purposes used when you are stating what the reality of a situation is 事实上；其实： There's still another ten minutes of the game to go, but /or practica! purposes it’s a〖rea^y over•比赛虽然还有十 分钟，但实际上等于已经结束了。

■                  noun (BrE, informal) a lesson or an exam in science or technology in which students have to do or make things, not just read or write about them 实习课；■实践 课;今验考_

praoti-cal-ity /.praekti'kaelati/ noun 1 [U] the quality of being suitable, or likely to be successful 可行性；适魚性 HT1 feasibility ： I have doubts about the practicality o/theirproposaL我怀疑他们的建议是否行得通。；2[U] the quality of being sensible and realistic 实事求是：

J was impressed by her pmcrioiifty.她做事踏女，着实 令我:赞叙。3 practicalities [pi.] the real facts and circumstances rather than ideas or theories 实际事物； 实际情况：It sounds like a good idea; let’s look at the practicalities and work out the costs•这个主意听起来不 错。卩p们来看实际运作，计算一下费用。

.practical 'joke noun a trick that is played on sb to make them look stupid and to make other people laugh 恶作剧；捉弄人的把戏► .practical _joker notm practic-aMy /'praektikli/ adv.

1 almost; very nearly几乎；差不多；很接近HIT! virtually ： TTie theatre was pmcficaHy empty.剧院几 乎是空的。◊ J meet/amous jpeopie practfcaHy every day. 舍几乎痦天都见梦]名人。◊ A4y essay h practicaHy /Wished now•我的埤文现在差木多写完了。◊ rhere’s practically no difference between the two options.

选择几乎没什么差别。,〇 note at almost 2 in a realistic or sensible way; in real situations 卖事求是地；卖际地： PracticaZ汐 speaking, we can’t aj和rd’it.泰际也来，我们 ....买不起这东西。◊ sounds Zffce a good idea, but 了 don’t thinfc it wiZZ worfcpmcricaHy.这个主意听起来不错，但我 认为它实际上行不通。一compare theoretically

■                  practical ’nurse /iotv/7 (/s/>\m£) a nurse with practical

experience but less training than a registered nurse 经验护古(有实际经验，但所受训练不及注册护士)/ practice /'praektis/ noun, verb • noun

►                 ACTION NOT IDEAS 实践 1 [u] action rather than ideas 实践；实际行动：the theory and practice 〇/ teaching 教 学■的理备实逢◊ She’s determined to put her new ideas into practice.她决心要把自.己的新想法付诸实践。

WAY OF DOING STH,做芦 2 [U? Cl a way of doing sth that is the usual or expected way in a particular organiza­tion or situation 邊 常的 做法； 惯例； 常规： common/ currenl/sta/idard practice —般 / 现行 7 常规做法◊ gufde〖ines/or good practice 优良做法的准则◊ a review 〇/pay and working practices对薪圣和工作制度的检讨◊ rdigi'ous practices 宗教习俗.一see also best practice,