speed 英 [spi:d] 　 美 [spid]

speed

speed　 英 [spi:d] 美 [spid]

v. 加速　 n. 速度　

进行时:speeding　 过去式:sped　 过去分词:speeded　 第三人称单数:speeds　 名词复数:speeds　

The car was gathering speed.　汽车逐渐加速。
a speedof 50 mph　每小时 50 英里

  • Speed most often describes acceleration or a high rate of motion. When something picks up too much speed, it can run off course, like a kid on a bike zooming uncontrollably down a steep hill.
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  • v. 加速
  • n. 速度

  • 1. The car was gathering speed.

    汽车逐渐加速。

  • 2. a speedof 50 mph

    每小时 50 英里

  • 3. travelling at the speed of light

    以光速行进

  • 4. The drugs will speed her recovery.

    这些药会加速她的康复。

  • 5. a ten-speed mountain bike

    十速山地自行车

  • 6. at high speed, at low speed, at full speed, at top speed

    以高╱低╱全╱最高速

  • speed (n.) Old English sped "success, a successful course; prosperity, riches, wealth; luck; opportunity, advancement," from Proto-Germanic *spodiz (source also of Old Saxon spod "success," Dutch spoed "haste, speed," Old High German spuot "success," Old Saxon spodian "to cause to succeed," Middle Dutch spoeden, Old High German spuoten "to haste"), from PIE *spo-ti-, from root *spe- (1) "to thrive, prosper" (source also of Sanskrit sphayate "increases," Latin sperare "to hope," Old Church Slavonic spechu "endeavor," Lithuanian spėju, spėti "to have leisure").
  • speed (v.) Old English spedan (intransitive) "to succeed, prosper, grow rich, advance," from the stem of speed (n.). Compare Old Saxon spodian, Middle Dutch spoeden "hasten," Old High German spuoton "to succeed, prosper," German sputen "make haste, hurry." Meaning "to go hastily from place to place, move rapidly" is attested from c. 1200. Transitive meaning "cause to advance toward success" is from mid-13c.; that of "send forth with quickness, give a high speed to" is first recorded 1560s; that of "to increase the work rate of" (usually with up) is from 1856. Meaning "drive an automobile too fast" is from 1908. Related: Speeded; sped; speeding.
speed ★ / spiːd ; NAmE spiːd / noun , verb speed speeds sped speeded speeding noun ★ rate of movement/action 运动╱行动速率 1 ★ [countable ,  uncountable ] the rate at which sb/sth moves or travels （运动的）速度，速率 ◆ He reduced speed and turned sharp left. 他减慢速度，向左急转。 ◆ The train began to pick up speed (= go faster). 火车开始加速。 ◆ The car was gathering speed. 汽车逐渐加速。 ◆ a speedof 50 mph/80 kph 每小时 50 英里╱ 80 公里的速度 ◆ at high/low/full/top speed 以高╱低╱全╱最高速 ◆ at breakneck speed (= fast in a way that is dangerous) 以不要命的速度 ◆ travelling at the speed of light/sound 以光速╱音速行进 ☞see also airspeed , ground speed 2 ★ [countable ,  uncountable ] the rate at which sth happens or is done （发生或进行的）速度；进度 ◆ the processing speed of the computer 计算机的处理速度 ◆ This course is designed so that students can progress at their own speed. 这门课的设计思路是让学生自己掌握进度。 ◆ We aim to increase the speed of delivery (= how quickly goods are sent). 我们力争加快送货速度。 3 ★ [uncountable ] the quality of being quick or rapid 快；迅速 ◆ The accident was due to excessive speed. 事故的原因在于速度过快。 ◆ She was overtaken by the speed of events (= things happened more quickly than she expected). 事态发展迅速为她始料所不及。 ◆ ( formal) A car flashed past them at speed (= fast). 一辆汽车从他们身边疾驰而过。 in photography 摄影 4 [countable ] a measurement of how sensitive film for cameras, etc. is to light 感光度 5 [countable ] the time taken by a camera shutterto open and close 快门速度 ◆ shutter speeds 快门速度 on bicycle/car 自行车；汽车 6 [countable ] ( especially in compounds 尤用于构成复合词 ) a gear on a bicycle, in a car, etc. 排挡；速 ◆ a four-speed gearbox 有四挡的变速箱 ◆ a ten-speed mountain bike 十速山地自行车 drug 毒品 7 [uncountable ] ( informal) an illegal amphetaminedrug that is taken to give feelings of excitement and energy 苯丙胺，安非他明（一种兴奋剂） IDIOMS full speed/steam aˈhead with as much speed or energy as possible 全速（或全力）向前 up to ˈspeed (on sth) 1 (of a person, company, etc. 人、公司等 ) performing at an expected rate or level （在某事上）达到应有的速度，达标 ◆ the cost of bringingthe chosen schools up to speed 使选定的学校达标所需的费用 2 (of a person 人 ) having the most recent and accurate information or knowledge 了解最新情况；跟上形势 ◆ Are you up to speed yet on the latest developments? 你了解最新的进展情况吗？ ☞more at haste , turn   n. verb ★ ( speed·ed , speed·ed ) HELP  In senses 1 and 2 spedis also used for the past tense and past participle. 作第 1 及第 2 义时，过去时和过去分词也用 sped。 move/happen quickly 快速运动╱发生 1 [intransitive ] + adv./prep. ( formal) to move along quickly 快速前行 ◆ He sped away on his bike. 他飞快地骑着车走了。 2 [transitive ] speedsb/sth + adv./prep. ( formal) to take sb/sth somewhere very quickly, especially in a vehicle 快速运送 ◆ The cab speeded them into the centre of the city. 出租汽车载着他们迅速驶往市中心。 3 [transitive ] speedsth ( formal) to make sth happen more quickly 加速；促进 ◆ The drugs will speed her recovery. 这些药会加速她的康复。 drive too fast 超速驾驶 4 [intransitive ] ( usually used in the progressive tenses 通常用于进行时 ) to drive faster than the speed that is legally allowed 超速驾驶；超速行驶 ◆ The police caught him speeding. 警察发现他超速行驶。 PHRASAL VERB ★ ˌspeed ˈup | ˌspeed sth↔ˈup to move or happen faster; to make sth move or happen faster （使）加速 ◆ The train soon speeded up. 火车很快加速了。 ◆ Can you try and speed things upa bit? 你能不能设法加快一点事情的进度？ speed / spiːd ; NAmE spiːd /
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