1. C U 速度，速率　 a (rate of movement) calculated by dividing the distance travelled by the time taken
2. U 快速，迅速　 quickness of movement or action

　build up ～　加速
　determine the ～　测定速度
　gather ～　（汽车）逐渐加速
　increase ～　提高速度
　keep to ～　保持速度
　lose ～　减速
　maintain ～　保持速度
　observe the ～ limits　遵守最高车速的限制
　pick up ～　加速
　reach a ～　达到某一速度
　reduce the ～　减速
　regulate the ～　调节速度
　wish sb good ～　祝愿某人成功
　average ～　平均速度
　breathless ～　令人上气不接下气的速度
　constant ～　匀速
　easy ～　从容不迫的速度
　full ～　全速
　high ～　高速
　low ～　慢速
　maximum ～　最高速度
　mean ～　平均速度
　normal ～　正常速度
　quick ～　快速
　top ～　最快速度
　uniform ～　匀速
　lightning ～　闪电般的速度
　reading ～　阅读速度
　～ indicator　速度表，速度仪
　～ multiplier　加速器
　at a ～ of 60 miles an hour　以每小时六十英里的速度
　at a certain ～　以一定的速度
　at top ～　以全速
　burst of ～　突然加速
　under full ～　全速地
　with all ～　全速地
　～ of light　光速

　Our speed averaged out at 50 km an hour.　我们的平均速度是每小时50公里。
　Few cars can equal this kind of car for speed.　很少有其他车在速度方面胜过这种车。
　Your speed must be reduced to the city speed as soon as you cross the border.　你一进市区车速就得减到市区的规定速度。
　If a tyre blows out while one is driving at high speed, it can be very dangerous.　高速行驶时车胎爆炸是很危险的。
　The motor hummed pleasantly as the plane reached cruising speed.　飞机达到最高速度时，马达发出的嗡嗡声很好听。
　A driver uses brakes to arrest his car's speed.　司机用刹车降低车速。
　The car must have gone into the side of the house at a tremendous speed.　那辆汽车准是以惊人的速度撞上了房子的侧面。
　The Marathoner ran at an average speed at the beginning of the race.　那位马拉松运动员开始时以中速赛跑。
　We were moving at different speeds.　我们以不同的速度前进。
　It will be late for work, would you please put speed on your car?　上班就要迟到了，你快点开车可以吗?
　With his speed and agility, Tom cut out all his competitors in the hurdle race.　汤姆跨栏时速度快，动作敏捷，击败了所有其他选手。
　Everyone was surprised by the speed with which the dispute was settled.　每个人都为这一争端解决得如此之快而感到吃惊。
　More haste, less speed.　欲速则不达。
　The driver was booked for exceeding the speed limit.　那位司机因超速驾车而被登记在案。
　He drove at a speed of sixty miles per hour.　他以每小时60英里的速度开车。
　On this superhighway drivers should keep to a speed of over 80 miles per hour.　在这条高速公路上，驾驶员必须保持每小时80英里以上的速度。
　Getting near the harbour, the fishermen began to ease down the speed of their boats.　驶进港口时，渔民们开始放慢了船的速度。
　This pneumatic tool will double the speed of assembly.　这个气动工具可以把装配速度提高一倍。
　Scientists have determined the speed of light.　科学家们已测定出光的速度。
　The new airplane flies at twice the speed of sound.　这种新研制的飞机能以音速两倍的速度飞行。

 ♣ at speed
　高速地；快地　at high speed; quickly
　It's dangerous to go round corners at speed.　高速转弯很危险。
　When we're travelling at speed the passing countryside just seems a blur.　当我们高速开车旅行时，沿途经过的乡村显得一片模糊。
　She finished typewriting the letter at speed.　她迅速打好那封信。

 ♣ speed, rate
　这两个词都可作“速率”解。其区别是：speed指固定的速度或可能达到的最高速度，而在指相对增长的速率时用rate. 试比较：
　
 ♣ speed, velocity
　speed　指运动的速度，既可指快速，也可指慢速；velocity表示沿一定路线运动的速度，通常指直线、弧线或圆周运动的速度，这个词可与speed通用，但多用于科学技术方面。例如：
　The velocity of sound falls far short of the speed of light.　音速远不及光速快。

1. 两个赛跑者以同样速度前进。
　［误］ The two runners are running with the same speed.
　［正］ The two runners are running at the same speed.
　［析］ at...speed表示“以…速度前进”; with...speed则表示“有…速度”。
2. 汤姆正在以难以令人相信的高速驾驶着自己的赛车。
　［误］ Tom was driving his sports car at the unbelievable high speed.
　［正］ Tom was driving his sports car at an unbelievable high speed.
　［析］ speed往往用于at a low speed或at a high speed的形式，表示“低速”或“高速”，这里的不定冠词a不能改为定冠词the.
3. 摩托车高速拐弯。
　［误］ The motorcar turned the corner at a full speed.
　［正］ The motorcar turned the corner at full speed.
　［析］ at full〔top〕 speed作“以全速”解时， full和top前没有冠词。

1. vt. & vi.急行；加速　 move along, go quickly; increase the speed of
2. vi.超速行驶　 go or drive too fast; break the speed

　～ a horse　催马快跑
　～ an arrow　射箭
　～ an undertaking　促进一项事业
　～ recovery　促进康复
　～ the construction pace　加速建设步伐
　～ the parting guest　祝愿离去的客人一路平安
　～ the process of digestion　促进消化过程
　～ the work　加快工作进度
　～ home　快速回家
　～ abruptly　突然地加速
　～ apparently　明显地加速
　～ cautiously　谨慎地加速
　～ fearfully　可怕地加速
　～ generally　普遍加速
　～ immediately　立即加速
　～ incessantly　持续不断地加速
　～ manly　果断地加速
　～ passively　被动地加速
　～ pleasantly　愉快地加速
　～ precipitately　鲁莽地加速
　～ probably　适当地加速
　～ quickly　迅速加速
　～ slowly　慢慢地加速
　～ unhesitatingly　即刻加速
　～ universally　普遍加速
　～ away　急速走开
　～ back　很快回去
　～ the wounded back to health　使伤员早日恢复健康
　～ up　（使）加速
　～ across　疾驶通过
　～ down the street　沿着街道飞驰
　～ over the country　迅速在全国传开
　～ through　迅速通过

　The ambulance sped to the hospital.　救护车快速开往医院。
　She sped home the moment she was told that her husband fell ill suddenly.　刚一听说丈夫突然病倒，她便马上奔回家。
　Was I really speeding, officer?　警官，我真的超速行驶了吗?
　The police stopped several drivers for speeding.　警察拦下了几辆超速行驶的汽车。
　He sped his car through the street.　他开车飞速地穿过街道。
　He sped the ball on its way.　他带球迅速前进。
　The rider sped his horse in the last round and won the first place in the horse race.　那位骑师在最后一圈扬鞭催马，获得了赛马比赛的第一名。
　Plenty of fresh air and exercise will speed his recovery.　充足的新鲜空气和锻炼会使他很快恢复健康。
　Gradually they recognized the place of good nursing in speeding recovery.　他们逐渐认识到精心护理对加速恢复的作用。
　The lawyer helped speed the processing of the will.　律师帮助尽快地执行遗嘱。
　Two other things happened that sped the process.　出了另外两件事，加快了这一进程。
　They took action to speed the new law through Parliament.　他们采取行动促使新法律在国会迅速通过。
　Soil conservation work has been greatly speeded since the conference.　会议召开之后，水土保持工作大大加快了。

 ♣ speed by　(v.+adv.)
　飞驰而过；掠过　go or pass quickly
　The days speed by.　日子过得很快。
　He caught a glimpse of the driver's face as the car sped by.　汽车开过时，他瞥见了司机的脸。
　After the train pulled out of the station, the woman turned her attention to the landscape speeding by.　火车开动以后，这位妇女的注意力转到窗外不停掠过的景物上。
 ♣ speed up　(v.+adv.)
　（使）加速　(cause to) increase the speed (of)
　My heart is speeding up.　我的心跳在加快。
　The jeep speeded up and soon overtook the truck.　吉普车加快了速度，不一会儿就超过了那辆卡车。
　The rise in the cost of living has been speeding up in recent years.　生活费用的上涨速度近年来一直在加快。
　Can you speed things up at all?　你能不能快一点?
　The railway station has speeded up the train service.　火车站已增开列车班次。
　Modernization is the key to speed up our agricultural development.　现代化是加快农业发展的关键。
　If you speed up your work, we can finish before it is dark.　要是你加紧，我们可以在天黑前结束工作。
　The work was speeded up.　工作已加快进行。

 ♣ speed, dash, hasten, hurry, quicken, rush
　这组词都有“催促”“赶紧”的意思。其区别是：quicken指动作变化短暂、快，活动性较强，使其变为更活泼、有力或敏捷；dash指在一个很短的距离内快速前进，也指赶忙做某事；hasten指在急速当中，有计划有秩序地，但有时也指突如其来和匆匆完事；hurry指迅速地移动，含有几分兴奋的意思，但也带有几分仓促、混乱的意思；rush指赶快、非常迅速地行进，所暗示的形势要比hurry来得更紧急，有时还带有暴力的意味；speed是一个比rush意思更强的词，与quicken近义，不同处在于暗示移动的快速。例如：
　Exercise quickens the pulse.　锻炼使脉搏加快。
　He dashed up the stairs.　他冲上了楼梯。
　The storm's approach hastened our departure.　暴风雨将要来临，我们只好赶快离开。
　The late arrivals hurried to their seats.　迟到的人匆匆走到自己的座位上去。

　司机因超速而被罚款。
　［误］ The driver was fined for over-speeding.
　［正］ The driver was fined for speeding.
　［析］ 表示“违章超速行驶”一般用speeding，不用over-speeding.

　［同义词］ n. expedition, haste, hurry, quickness v. dash, hasten, hurry, quicken, rush
　［词源］　古英语sped（速度）