speed1/spid; spiːd/n 1 [C,U] how fast something moves〔物体移动的〕速度﹐速率: What speed were you travelling at ? 你当时的行驶速度是多少?at a speed of 30 mph/100 kph etc driving along at a speed of 60 mph 以每小时 60 英里的速度驾驶trains travelling at high speeds 高速行驶的火车We drove off at top speed (=as fast as possible). 我们以最快的速度驾驶而去。Motorists are being encouraged to reduce their speed . 请司机放慢速度。COLLOCATIONS 词语搭配at high/low speed 以高速/低速at great speed 以很高的速度at top/full speed 以最高速度/全速at lightning speed – extremely fast 以极快的速度﹐以闪电般的速度at breakneck speed – dangerously fast 以要命的速度at the speed of light 以光速2 [U] the rate at which something happens〔某事发生或进行的〕速度: +of the speed of change within the car industry 汽车工业内部的变革速度3 [U] the quality of being fast 快﹐快速: She acted with speed and efficiency. 她的行动干净利落。The train began to pick up speed (=gradually move faster). 火车开始加速。
speed2v past tense and past participle sped /spɛd; sped/1 [I] to move quickly 迅速移动﹐快行: The bus sped along the motorway. 公共汽车在高速公路上疾驰。2 be speeding to be driving faster than the legal limit 超速驾驶 —speeding n [U] speed up phr v past tense and past participle speeded 1 to move faster [ slow down ] 加速﹐增速2 to happen more quickly, or to make something happen more quickly [ slow down ](使)加快: speed sth up an attempt to speed up production at the factory 工厂加速生产的尝试