| 单词 | occur |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔ENOUGH/NOT ENOUGH〕If this cut in resources occurs, it could severely damage a social fabric that is already stretched to the breaking point. 如果资源像这样减少的话，会对本已不堪重负的社会结构造成严重影响。朗文写作活用〔EXIST〕The disease occurs mainly in children, but can also occur in adults. 这种疾病主要发生在儿童身上，但也会发生在大人身上。朗文写作活用〔GET〕I've been collecting samples of the different types of rock which occur in this area. 我一直在收集本地区各种岩石的样本。朗文写作活用〔HAPPEN〕Major earthquakes like this occur very rarely. 像这样的大地震极少发生。朗文写作活用〔K selection〕A form of selection that occurs in an environment at or near carrying capacity, favoring a reproductive strategy in which few offspring are produced.常量选择：一种选择形式，当一个环境到达或临近其最大容纳量之时，一种减少繁衍后代的生育策略更受欢迎美国传统〔MOST〕The great majority of accidents in the Alps occur while climbers are coming down. 阿尔卑斯山上的绝大部分意外事故都发生在登山者下山时。朗文写作活用〔POSSIBLE〕Mistakes can occur, even in the most carefully controlled situations. 甚至在最小心控制的情况下仍有可能出错。朗文写作活用〔TAKE PART/BE INVOLVED〕The most effective learning occurs when the child is allowed to play a more active role in the learning process. 当孩子能更积极地参与到学习过程中去时，学习才最有效。朗文写作活用〔THINK〕Didn't it occur to you that I might be worried? 你当时没有想到我也许会担心吗?朗文写作活用〔UNDER/BELOW〕Petroleum occurs in natural deposits beneath the surface of the earth. 石油出现在地表下面的天然沉积物中。朗文写作活用〔abort〕Computer Science A procedure to terminate execution of a program when an unrecoverable error or malfunction occurs.【计算机科学】 异常结束：当一种无法补救的错误或故障发生时中止计算机程序的运行美国传统〔accompany〕To coexist or occur with.与…共存，与…一同发生美国传统〔aeroembolism〕Embolism that occurs as a result of the entrance of air bubbles into a blood vessel after surgical procedures or trauma.气泡栓塞症：外科手术或外伤之后，由于气泡进入血管而导致的栓塞症美国传统〔affix〕Linguistics A word element, such as a prefix or suffix, that can only occur attached to a base, stem, or root.【语言学】 词缀：词素，如前缀或后缀，其只能通过附加于词基、词干或词根而出现美国传统〔all-important〕We learned what to do in those all-important few minutes after an accident occurs.我们知道在事故发生后至关重要的几分钟内需要做些什么事情。麦克米伦高阶〔anaerobic〕Anaerobic respiration occurs only in particularly active tissues such as muscles during severe exercise.厌氧呼吸只有在处于剧烈运动状态的肌肉等特别活跃的组织中才会发生。柯林斯高阶〔assault〕The concluding stage of an attack in which close combat occurs with the enemy.突击：军事攻击中与敌人展开近距离肉搏的最后阶段美国传统〔association〕Seizures or convulsions may occur in association with fever.癫痫或抽搐可能与发热同时出现。外研社新世纪〔atrial〕Premature beats that occur in the atria are called premature atrial contractions.出现在前房的期外搏动被称为早发性心房收缩。剑桥高阶〔authority〕The system notifies the authorities when a security breach occurs.破坏安全的行为发生时，该系统就会通知当局。牛津搭配〔biennial〕An event that occurs every two years.每两年发生一次的事美国传统〔cachexia〕Weight loss, wasting of muscle, loss of appetite, and general debility that can occur during a chronic disease.恶病质，差的体质：慢性病患者发生的体重减轻，肌肉疲劳，食欲减退和普遍衰弱的症状美国传统〔carry/take (something) to extremes〕Problems can occur when people carry/take dieting to extremes.人们过度节食会出问题。韦氏高阶〔chop〕When the reorganization occurs, the smaller departments will be the first for the chop.进行重组时，较小的部门将会首先被砍掉。剑桥高阶〔clear l〕A clear l usually only occurs before vowels.通常只有在元音前的“I”才发清音。剑桥高阶〔clear-air turbulence〕A severe atmospheric turbulence that occurs under otherwise tranquil conditions and subjects aircraft to strong updrafts and downdrafts.晴空湍流：一种剧烈的空气湍流，发生在其它方面平静的条件下并使飞行器发生强烈的上下颠簸美国传统〔come〕There will come a time when the crisis will occur.危机总有一天会爆发。柯林斯高阶〔concern〕Our main/primary/principal concern is to assure that these problems do not occur again.我们主要关心的是确保不再出现这些问题。韦氏高阶〔concur〕To occur at the same time; coincide.同时发生；巧合美国传统〔construction〕Construction on the bridge will occur daily from 8:00 p.m. to 4:00 a.m.桥梁施工将于每天晚上8点开始，凌晨4点结束。韦氏高阶〔contingent〕Liable to occur but not with certainty; possible.可能的：可能但又有不确定性的；可能的美国传统〔control〕Flight delays do occur, for reasons that are outside our control .飞机误点的确会发生，其原因不是我们可以控制的。朗文当代〔copy〕Changes can occur when DNA is copied from one cell to another.当DNA从一个细胞被复制到另一个细胞时，可能会发生变化。麦克米伦高阶〔core〕The part of a nuclear reactor where fission occurs.活性区，堆心：核反应堆中发生裂变的地方美国传统〔cotidal〕Of or relating to a line that passes through each location on a coastal map where tides occur at the same time of day.同潮线的：沿岸地图上穿过一天中同时有潮经过的地点的连线的，或与等潮线有关的美国传统〔cradle cap〕A form of dermatitis that occurs in infants and is characterized by heavy, yellow, crusted lesions on the scalp.乳痂：一种发生于婴儿身上的皮炎，其特征是在头皮上出现大量的黄色粘附物美国传统〔crossing over〕The exchange of genetic material between homologous chromosomes that occurs during meiosis and contributes to genetic variability.交换：一种发生在减数分裂期间的、有助于遗传变异的同源染色体之间的遗传物质的交换美国传统〔cutaneous〕Cutaneous anthrax occurs when anthrax touches a cut or scrape on the skin.皮肤炭疽病的发生是因为炭疽接触到了皮肤上的割伤或擦伤。剑桥高阶〔cycle〕To occur in or pass through a cycle.周而复始，循环：周期性的发生或者运动美国传统〔cyclically〕These events occur cyclically.这些事是周期性出现的。韦氏高阶〔cystocele〕Urinary tract infections may occur because of a cystocele.膀胱膨出可能导致泌尿道感染。剑桥高阶〔delay〕Passengers complain about lack of information when travel delays occur.旅客抱怨说旅途中发生延误时没有人告知相关信息。牛津搭配〔deterioration〕Mental and physical deterioration both occur naturally with age.随着年龄的增长，心智和体力会自然衰退。牛津搭配〔development〕Cell divisions during development occur in a fixed sequence.发育期间的细胞分裂以固定顺序进行。牛津搭配〔dioecious〕Characterized by species in which the male and female reproductive organs occur on different individuals; sexually distinct.雌雄异体的：雌雄异株的雌花和雄花生在不同的个体上；性区别的美国传统〔eat into〕Ulcers occur when the stomach's natural acids eat into the lining of the stomach.胃酸侵蚀胃内壁引发溃疡。柯林斯高阶〔education〕Technology allows distance education to occur at all levels.科技使人们可以获得各种层次的远程教育。牛津搭配〔enharmonic〕Of, relating to, or involving tones that are identical in pitch but are written differently according to the key in which they occur.等音的：在音高上一致但按其所在主调的出现而写法不同的音调的美国传统〔epididymis〕Harmless cysts may occur in the epididymis.附睾中可能生长良性胞囊。剑桥高阶〔episode〕A section of a classic Greek tragedy that occurs between two choric songs.希腊古典悲剧中两段合唱之间的部分美国传统〔equinox〕In the Chinese calendar, the Spring Equinox always occurs in the second month.在中国历法中，春分总是出现在2月。柯林斯高阶〔ethology〕The scientific study of animal behavior, especially as it occurs in a natural environment.动物行为学：对动物行为，尤指在自然环境下发生的行为的一种科学研究美国传统〔every〕Every now and then an event occurs that changes public attitudes.时不时地就会有改变公众态度的事件发生。麦克米伦高阶〔external〕Such events occur only when the external conditions are favourable.这样的事情只有在外部情况适宜时才会发生。外研社新世纪〔extreme〕Problems only occur when this attitude is taken to extremes.只有当这种态度走向极端时，问题才会出现。朗文当代〔facing〕Most avalanche accidents occur on north- and east-facing slopes.大多数雪崩事件发生在面北和面东的斜坡上。剑桥高阶〔fadeaway〕The act or an instance of gradually diminishing in brightness, loudness, or strength until actual disappearance occurs.逐渐消失：在亮度、响度或精力上逐渐减弱直至全部消失的活动或例子美国传统〔feeler〕When vacancies occur, the office puts out feelers to the universities.出现职位空缺时, 办事处就会到各个大学去打探。外研社新世纪〔feeler〕When vacancies occur, the office puts out feelers to the universities.有空缺职位的时候，办事处就到各个大学去打探。柯林斯高阶〔fit〕The fits usually occur at night.这种病一般在晚上发作。牛津搭配〔fortune〕To occur by chance; happen.偶然发生；碰巧美国传统〔frequency〕Accidents occur here with increasing frequency.更加频繁地麦克米伦高阶〔frequency〕The program can show us word frequency(= how often words occur in a language).这个程序可给我们显示词频。牛津高阶〔frequency〕The ratio of the number of times an event occurs in a series of trials of a chance experiment to the number of trials of the experiment performed.频数：一系列实验中偶然现象次数与所做的一系列实验的次数的比率美国传统〔frequent〕How frequent is this word(= how often does it occur in the language)? 这个单词出现的频率如何？牛津高阶〔full moon〕The period of the month when such a moon occurs.满月期：一个月中有满月的日子美国传统〔fuse〕Conception occurs when a single sperm fuses with an egg.受孕发生在单个精子与卵子结合的时候。柯林斯高阶〔gain〕To delay or prolong something until a desired event occurs.羸得时间：延迟或拖延直到希望的事件发生美国传统〔happen〕To take place or occur by chance.偶然发生或出现美国传统〔high tide〕The time at which this tide occurs.高潮时期：高潮出现的时期美国传统〔illness〕Some illnesses occur more frequently following puberty.有些疾病在青春期以后发作更加频繁。牛津搭配〔imminence〕Something about to occur.马上要发生的事物美国传统〔imminence〕The quality or condition of being about to occur.急迫：马上要发生的状态或性质美国传统〔induction〕Induction into university education occurs not at 18 but at 16.不等(学生)到18岁,而是在16岁时就开始(给他们)传授大学教育须知。英汉大词典〔infection〕If the primary infection is not treated further outbreaks may occur.如果初次感染得不到治疗，就可能会进一步发作。牛津搭配〔intractable〕The most intractable pain often occurs when the nerves themselves are damaged.神经本身受损时, 常会出现最难治愈的疼痛。外研社新世纪〔ipso facto〕If a crime occurs then there is, ipso facto, a guilty party.如果犯罪发生了,那么根据事实本身,就会有有罪的一方。柯林斯高阶〔lateral meristem〕A meristem in vascular plants, such as the cambium, in which secondary growth occurs.侧分生组织：可形成再生的维管植物分生组织，如形成层美国传统〔liable〕Difficulties are liable to occur.困难可能发生。英汉大词典〔mafic〕Containing or relating to a group of dark-colored minerals, composed chiefly of magnesium and iron, that occur in igneous rocks.铁镁质的：含有或与一组深色矿物有关的，主要由镁和铁组成，出现在火成岩中的美国传统〔magnetorheology〕The study of the changes in flow properties that occur in certain fluids exposed to magnetic fields.磁流变：对暴露于磁场中的某些流体中发生的流体属性变化的研究美国传统〔mainly〕Anorexia is an illness that occurs mainly in adolescents.厌食症是一种多发于青少年的疾病。牛津高阶〔massive〕If the drought continues, deaths will occur on a massive scale.如果旱情持续，将有大批人死亡。剑桥高阶〔meltdown〕Emergency cooling systems could fail and a reactor meltdown could occur.紧急冷却系统有可能失灵，核反应堆有可能发生堆芯熔毁。柯林斯高阶〔middle name〕A name that occurs between a person's first name and surname.中间名：位于一个人的姓与名之间的名字美国传统〔millenarian〕One who believes the millennium will occur.千禧年信奉者：相信千禧年会复活的人美国传统〔mistake〕When hay fever first occurs, it is often mistaken for a summer cold.花粉病发病初期常被误认为是风热感冒。外研社新世纪〔mode〕Mathematics The number or range of numbers in a set that occurs the most frequently.【数学】 众数：一组中出现最频繁的数或数列美国传统〔mosaicism〕A condition in which tissues of genetically different types occur in the same organism.镶嵌现象：一种不同遗传种类的组织产生于相同有机体中的现象美国传统〔most〕The report shows the intersections at which accidents are most likely to occur.报告展示了最可能发生事故的十字路口。韦氏高阶〔movement〕Some movement in the building will occur as it settles into the subsoil.建筑物沉降到下层土时会发生位移。牛津搭配〔musth〕An annual period of heightened aggressiveness and sexual activity in male elephants, during which violent frenzies occur.雄象发情狂：每年雄象出现充满杀机和交配行为的时期，这个时期雄象会极度狂乱美国传统〔natural resource〕A material source of wealth, such as timber, fresh water, or a mineral deposit, that occurs in a natural state and has economic value.天然资源：财富的物质资源，例如树木，淡水、矿床，以自然的形式存在并且有经济价值美国传统〔naturally〕Testosterone is a hormone that occurs naturally in the human body.睾丸激素是人体内自然产生的一种激素。麦克米伦高阶〔naturalness〕Nitrates are chemicals that occur naturally in water and the soil.硝酸盐是水和土壤中自然存在的化学物质。柯林斯高阶〔necessity〕Further changes to the company will occur of necessity.公司深化改革势在必行。韦氏高阶〔occasion〕The time at which an event occurs.这种事件发生的时刻美国传统〔occur to sb〕The thought did occur to me.我确实冒出了这个念头。剑桥高阶〔occur〕Didn't it occur to you to phone them about it? 你难道没想到就这事给他们打个电话吗? 英汉大词典〔occur〕Fish occur in most waters.大多数的江河湖海中都有鱼。英汉大词典〔occur〕Fish doesn't occur in the river.这条河现在已经没有鱼了。21世纪英汉〔occur〕Heavy rains occur during a summer monsoon.暴雨出现在一个夏季季风期美国传统〔occur〕His name just did not occur to my memory.我就是想不起他的名字来。英汉大词典〔occur〕I suppose it didn't occur to you to phone the police? 我想你根本就没想到打电话报警吧？朗文当代〔occur〕If headaches only occur at night, lack of fresh air and oxygen is often the cause.如果只是在晚上头疼，那常常是由于缺乏新鲜空气和氧气的缘故。柯林斯高阶〔occur〕It didn't occur to her to ask how he'd found her.她没想到要问他是怎么找到她的。麦克米伦高阶〔occur〕It never seems to occur to my children to contact me.我的子女好像从来都没想到和我联系。朗文当代〔occur〕Minerals occur naturally in the earth's crust.矿物自然存在于地壳中。剑桥高阶〔occur〕Nitrates are chemicals that occur naturally in water.硝酸盐是水里天然存在的化学物质。外研社新世纪〔occur〕Opportunities for learning occur spontaneously every day.学习的机会每天都会自然而然地出现。牛津搭配〔occur〕The cattle disease occurs more or less anywhere in Africa where the fly occurs.在非洲凡是有这种蝇虫的地方，几乎都会出现这一牛病。柯林斯高阶〔occur〕The phrase occurs often in the Koran.这句话经常出现在《古兰经》里。外研社新世纪〔occur〕These are just some of the elements that occur on our planet.这些只是在我们星球上发现的部分元素。麦克米伦高阶〔occur〕These chemical changes occur naturally.这些化学变化是自然发生的。牛津搭配〔occur〕Violence of some type seems to occur in every society.每个社会似乎都会存在某种形式的暴力。剑桥高阶〔occur〕We hope this won't occur again.我们希望别再发生这样的事。英汉大词典〔onyx〕A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos and intaglios.缟玛瑙：一种带有条纹和多种颜色的玉髓，它被用来作饰物的宝石，常用于浮雕和凹雕美国传统〔operant〕Psychology Of, relating to, or being a response that occurs spontaneously and is identified by its reinforcing or inhibiting effects.【心理学】 操作性的：指按照反应的结果而不以产生反应的刺激来说明反应的美国传统〔organized crime〕Widespread criminal activities, such as prostitution, interstate theft, or illegal gambling, that occur within a centrally controlled formal structure.集团犯罪：范围很大的在集权控制的犯罪结构中发生的犯罪活动，如娼妓、州际盗窃或非法赌博美国传统〔or〕Most aircraft accidents occur at either take-off or landing.多数的空难事故不是发生在起飞的时候就是发生在降落的时候。英汉大词典〔out of〕The disease occurs in one out of a thousand people.一千个人中有一个人会患上这种疾病。韦氏高阶〔ovulation〕By noticing these changes, the woman can tell when ovulation is about to occur.留意这些变化, 女性便会知道自己什么时候要排卵。外研社新世纪〔oxygen〕The human brain needs to be without oxygen for only four minutes before permanent damage occurs.人的大脑缺氧4分钟后便会造成永久性损伤。柯林斯高阶〔pass〕To occur.出现，发生美国传统〔phenomenon〕The phenomenon occurs in the early stages of pregnancy.这种现象出现在怀孕早期。牛津搭配〔place〕Why do strikes occur so frequently in coal mines in the first place? 罢工如此频繁地在煤矿发生,究竟是什么原因? 英汉大词典〔population〕Ecology All the organisms that constitute a specific group or occur in a specified habitat.【生态学】 种群，族群：构成某一群体或生活在某一栖居地的所有生物美国传统〔precondition〕A condition that must exist or be established before something can occur or be considered; a prerequisite.前提：在某事发生或得到考虑之前必须存在或被承认的状况；先决条件美国传统〔predominantly〕Although it is predominantly a teenage problem, acne can occur in early childhood.虽然粉刺多发于青少年时期，但也可能在刚进入童年时期就出现。柯林斯高阶〔probability〕Mistakes could and, in all probability, would occur.错误可能 — 而且也完全有可能发生。朗文当代〔processing〕It occurs in elderly men, apparently as part of the ageing process.这种情况出现在老年人当中，显然是衰老过程的一部分。柯林斯高阶〔process〕The regularity with which this occurs suggests that the process is genetically determined.这种现象出现的规律性表明该过程是由基因决定的。外研社新世纪〔pseudopregnancy〕A condition resembling pregnancy that occurs in some mammals, marked by persistence of the corpus luteum and usually following infertile copulation.假孕：发生在某些哺乳动物身上的类似于怀孕的状态，以不断分泌黄体素为特征，通常发生在不育性交配以后美国传统〔ramp〕A concave bend of a handrail where a sharp change in level or direction occurs, as at a stair landing.弯子：栏杆的凹弯，此处有急骤的高度或方向变化，如在楼梯底座处美国传统〔reactor core〕The central part of a nuclear reactor where atomic fission occurs.反应器炉心：原子反应炉的中间部分，也就是原子分裂产生的地方美国传统〔recitation〕The class period within which this delivery occurs.背书课：一段用于让小学生背书的课内时间美国传统〔recovery〕The economic circumstances are right and recovery is on the way (= recovery will occur soon).经济状况良好，复苏指日可待。牛津搭配〔resolve〕The board has resolved that it is in the best interests of the club that this occur immediately.董事会作出决议, 为了俱乐部的最大利益这件事应马上进行。外研社新世纪〔rodent ulcer〕A cancerous skin ulcer that derives from basal cells and usually occurs on the face.侵蚀性溃疡，侵蚀性癌，基底细胞癌：一种衍生于基底细胞且通常发生在脸上的癌变皮肤溃疡美国传统〔role indicator〕In information retrieval, a code that is assigned to a key word to indicate the part of speech or function of the word in the text where it occurs.作用指示符：信息检索时，指定给某一关键词以表示文本中单词的词性或功能的编码美国传统〔rolling〕Rolling occurs most often in the lavatories of cinemas.盗窃经常发生在电影院的盥洗室中。英汉大词典〔salic〕Of or relating to certain minerals, such as quartz and the feldspars, that commonly occur in igneous rocks and contain large amounts of silica and alumina.硅铝质的：属于或有关特定矿物质的，如石英和长石，常常在火成岩中出现，含有大量硅和铝美国传统〔second wind〕The return of relative ease of breathing after the initial exhaustion that occurs during continued physical exertion.恢复正常呼吸：发生于持续的体力消耗过程中，由最初的精疲力尽阶段又恢复到呼吸相对均匀的状态美国传统〔separation〕A common example of separation anxiety occurs when children are left at day care.分离焦虑症常见的例子出现在孩子被留在托儿所的时候。牛津搭配〔separation〕The place at which a division or parting occurs.分隔区：分隔或分离发生的地点美国传统〔septennial〕An event that occurs every seven years.每七年发生一次的事件美国传统〔signatory〕The Convention requires signatories to punish genocide when it occurs.会议要求签署方在种族大屠杀发生时进行制裁。牛津搭配〔solum〕The upper layers of a soil profile in which topsoil formation occurs.土层：一块土地纵断图中上面的几层，表土就形成于其中美国传统〔spark gap〕A gap in an otherwise complete electric circuit across which a discharge occurs at a prescribed voltage.火花隙：按规定电压产生放电的完整电路圈的缝隙美国传统〔species〕Similar species of fish occur in Mongolia.相似的鱼类物种在蒙古出现。牛津搭配〔spree killer〕A serial killer whose murders occur in a very short span of time and follow no discernible pattern.狂欢杀手，疯狂杀手：在很短时间内，以无法辨别的手法犯下连续谋杀行为的杀手美国传统〔spring tide〕The exceptionally high and low tides that occur at the time of the new moon or the full moon when the sun, moon, and earth are approximately aligned.朔望潮：新月和满月间当太阳、月亮、地球几乎成一线时发生的特别高低起伏的大潮美国传统〔stop〕Stop up each breach as it occurs.一出现裂口就要堵住。英汉大词典〔suicide〕Many suicides occur in prisons.监狱中的自杀事件很多。剑桥高阶〔supernova〕At least one supernova occurs per decade in our galaxy.在我们的星系中每 10 年至少有一颗超新星出现。柯林斯高阶〔syncopation〕Music A shift of accent in a passage or composition that occurs when a normally weak beat is stressed.【音乐】 切分：一段或一篇乐章中通常为弱拍的节拍被强调时所产生的重音变化美国传统〔take〕To happen; occur.发生；出现美国传统〔tertiary〕Headaches often occur during the tertiary stage of the illness.这种疾病的第三阶段常常会出现头疼。韦氏高阶〔that〕It is when the lights have gone out that accidents sometimes occur.正是在熄灯后有时会发生事故。英汉大词典〔tic〕The verbal tic “you know” often occurs in her speech.她的讲话中经常出现“你知道”这样的口头禅。韦氏高阶〔time〕A nonspatial continuum in which events occur in apparently irreversible succession from the past through the present to the future.时间：事件从过去到现在至未来以不可逆转的顺序发生的非空间性的延续美国传统〔transformation〕Chemical transformations occur.发生了化学转换。柯林斯高阶〔transpire〕Usage Problem To come about; happen or occur.【用法疑难】 产生；发生或出现美国传统〔trickle〕A slow, small, or irregular quantity that moves, proceeds, or occurs intermittently.涓滴，细流：流量缓慢、细小而不规则，断断续续地移动、前进或出现美国传统〔trimorph〕A substance that occurs in three distinct crystalline forms.三异晶体同质矿物：一种以三种不同的结晶形式出现的物质美国传统〔trimorph〕One of the crystalline forms in which a trimorphic substance occurs.三异晶形之一：三异晶形同质物的三种结晶形式之中的一种美国传统〔trough〕The trough in consumption of electricity occurs at night.夜间是电力消耗的低谷期。外研社新世纪〔umbilical hernia〕A usually self-correcting hernia of the intestines in which protrusion occurs through the abdominal wall in the region of the navel.脐疝：肠道的一种通常是自我愈合的疝气，隆起物发生在肚脐周围的腹壁美国传统〔uncertain〕It is uncertain how likely this is to occur.出现这种情况可能性有多大还不清楚。朗文当代〔usual〕These adjectives apply to what is expected or familiar because it occurs frequently or recurs regularly.这些形容词是指其事是可预见的或熟悉的，因为它是经常发生的或有规律地发生的。美国传统〔vergence〕The inward or outward turning of one or both eyes that occurs when focusing on an object.注视点：目光集中在一个物体上时，单颗或两颗眼珠向内或向外的转动美国传统〔what〕What would occur if; suppose that.假设；如果…将会怎么样美国传统〔withdrawal symptoms〕If these drugs are stopped abruptly then some withdrawal symptoms may occur.如果突然停服这些药，则可能出现一些戒断症状。柯林斯高阶〔write〕It is written that failure will occur.注定会失败。外研社新世纪〔xenolith〕A rock fragment foreign to the igneous mass in which it occurs.捕虏体：指在火成岩中形成的外来岩石碎片美国传统According to the report, most accidents occur when young children are left unattended in the home.根据报告, 大部分事故发生在年幼的孩子们被留在家里无人照料的时候。剑桥国际Almost one in ten divorces occur within the first two years of marriage.几乎1/10的离异都发生于结婚的前两年。剑桥国际An ordinary jubilee occurs every twenty-five years. 普通大赦年每二十五年轮到一次。译典通Changes caused by the radiation first occur at the cellular level.辐射造成的变化首先发生在细胞层次。剑桥国际Decay is far more likely to occur with gooey sweets which stick to your teeth and encourage plaque to form.有了粘牙和加快牙斑形成的粘糖,蛀蚀更易发生。剑桥国际Dozens of aftershocks occur after a giant earthquake. 一次大地震之后，总是有数十个余震。译典通Evolution occurs as a result of adaptation to new environments.进化是对新环境适应的产物。剑桥国际Fertilization occurs as the eggs are laid.受精在产卵时发生。剑桥国际I don't believe he would do that--the thought would never occur to him.我不相信他会那样做----他不会有那种念头。剑桥国际If any of these symptoms occur while you are taking the medicine, consult your doctor immediately.在你吃药的时候，如果产生了这些症状中的任何一种，应立即向你的医生询问。剑桥国际If the drought continues, deaths will occur on a massive scale.如果旱情持续，将有大批人死亡。剑桥国际Just jot down anything that occurs to you.想到什么就写下来。剑桥国际Many researchers have striven for a greater understanding of the processes which occur inside stars.许多研究者力求进一步了解恒星内部的活动。剑桥国际Most avalanche accidents occur on north- and east-facing lee slopes.大多数的雪崩事故发生在朝北和朝东的背风坡上。剑桥国际Osteoporosis afflicts many older women because of the loss of calcium and estrogen that commonly occurs in women after menopause.一般在妇女绝经以后，由于失钙和雌性激素，许多老年妇女深受骨质疏松症的折磨。剑桥国际Oxygen occurs widely in organic and inorganic compounds.氧在有机化合物和无机化合物中广泛地存在。剑桥国际She's written a program to find words which frequently occur together.她设计了一套程序能找到经常一起出现的单词。剑桥国际Some firms become too large and reach a point where diseconomies of scale occur.有些企业变得太大，达到了规模不经济的地步。牛津商务The athletes discussed the discharge of energy that occurs in a race.运动员们讨论了比赛中的能量释放问题。剑桥国际The differentiation of the fetal organs occurs in the first few weeks after fertilization.胚胎器官的变异发生在受精后的头几个星期。剑桥国际The process of physical maturation normally occurs more quickly in girls than in boys.女孩比男孩成熟得快。剑桥国际Violence of some sort seems to occur in every society.某种暴力行为似乎在每个社会都会存在。剑桥国际When heavy atoms are split in this way some loss of mass occurs. 当重原子这样被分裂的时候，就会发生质量的减少。译典通Where do injuries occur off-the-job? 非因公负伤都发生在哪些地方？牛津商务Widespread ionization occurs readily in the Earth's upper atmosphere.地球的高层大气中到处都在迅速地发生电离作用。剑桥国际 |
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