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speed RATE OF MOVEMENTspi:dn(a) rate at which something moves or happens速度The average traffic speed in London is only 4 mph faster than 100 years ago when there were horses and carriages. [C]伦敦的车辆速度只比100年前快4英里/小时，而那时的交通工具是马和马车。The pilot said that our cruising speed would be around 550 miles per hour. [C]飞行员说我们的航行速度约550英里/小时。The car has a top speed of 155 miles per hour. [C]这辆汽车的最高时速是155英里/小时。You should lower/reduce your speed as you approach a junction. [U]你在接近交叉路口时应该放慢/降低速度。The orchestra played the symphony at a slower speed than usual. [C]管弦乐队演奏这首交响乐的速度比往常慢一点。We drove at a steady speed all the way. [C]一路上我们以稳定的速度驾驶着汽车。He came off the road while driving his car round a bend at high/breakneck speed (= very fast). [U]他以极快的速度转弯，离开了马路。We are heading (at) full speed (= fast) for a horrific war. [U]我们正全速走向可怕的战争。The fire spread at lightning speed (= very fast). [U]火势迅速蔓延开来。Concorde was the first passenger aircraft to fly at supersonic speed. [U]协和式飞机是第一架载客型超音速飞机。The rocket will travel to Mars at a speed of over 25 000 miles per hour. [C]火箭将以每小时25 000英里的速度飞向火星。The speed of light/sound is the rate at which light/sound travels.光/音速The speed of light is 300 million metres per second. [U]光速是每秒钟3亿米。(fig.) The news travelled at the speed of light. [U]这条新闻光速般极迅速地传播开来。These planes travel at twice the speed of sound. [U]这些飞机的飞行速度是音速的两倍。This electric drill has two speeds (= rates at which it turns). [C]这个电钻有两档速度。A speed is also a GEAR (= a part of a vehicle which controls the rate at which it moves)(汽车等的)排档，变速器My bicycle has ten speeds. [C]我的自行车有十种速度。I have a ten-speed bicycle.我有一辆十速的自行车。The speed of a photographic film is the rate at which the film receives light.感光度What speed film do I need for taking photographs indoors? [C]我在室内拍照该如何调整感光度？The speed of a camera is the rate at which part of it opens to allow light to reach the film when a photograph is being taken.快门速度a high/low shutter speed.高/低速快门速度If you get or bring something up to speed you make it move as fast as it can.以最快速度移动This kind of race requires a different set-up and we've not got the car up to speed.这类比赛需要不同的安排，我们没有足够快的车可供使用。You can also say something or someone is up to speed if they are fully informed about what they need to do or are completely able to do it.完全明白(要做的事)，完全能胜任The BBC needed to be brought up to speed with commercial broadcasters in the areas of efficiency, savings and producer choice.应该让英国广播公司完全明白商业广播在效率、资金积累和制片选择方面该如何做。Carrington was at his country home, getting up to speed with developments down on the farm.凯林顿在他的家乡对农场的发展作了全面了解。In any strike there are difficulties getting the company back up to speed.任何罢工都会使公司难以重新开展日常事务。
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