n (1)速度(率)(relative rapidity in moving，going，etc;rate of motion or progress)[C，U]：the～of light/a chemical reaction 光速/化学反应的速度 at high/top/full～以高/最高/全速;move at (a) slow/steady～以缓慢/稳定的速度行进;drive at/keep to a～of more than 140 kilometres an hour 以每小时140多公里的速度驱车/保持每小时140公里的速度;reach～s in excess of 2000 kilometres an hour 达到一小时2000公里以上的高速度;～limit 车速限制;〖同〗rate;

(2)快捷，迅速(quickness of moving)[U]：move with great～非常迅速地移动;a runner with good～速度极快的赛跑者;moderate/reduce～匀/减速;need a lot more～需要更快速; More haste， less～. 欲速则不达。～-reading/-skating 快速阅读/速度滑冰;〖同〗quickness，dash，rapidity;〖反〗slowness;

(3)感光度;快门速度(sensitivity of film or paper to light;time taken by a camera shutter to open and close)[C]：What is the～of the film? 这种胶片的感光速度是多少?the same shutter～s 相同的快门速度;take a photograph at a～of 1/100 0 of a second 用百分之一秒的快门速度拍一张照片;

(4)排挡，变速器(gear or set of gears，as in the transmission of a bicycle or motor vehicle)[C](尤构成合成词)：a 5-～bicycle/gearbox 五速的自行车/齿轮箱;

at speed 高(迅)速;The car was travelling at～. 汽车正高速行驶。

v(1)速行(进)(go or move quickly)[I+prep]：During holidays the hours usually～by.假期中时间通常过得很快。～to the hospital/down the street/past sb/through the countryside 飞速前往医院/沿街急行/飞快地从某人身旁走过/急速穿过乡村;〖同〗hurry，rush，hasten，run，race;〖反〗creep，crawl，drag;

(2)使速行(进)(cause to go or move quickly)[T+n，T+n+prep]：He sped her on her way/her climb. 他催她快上路/快爬。～sb to a waiting helicopter/the car through the streets 迅速把某人送进等待的直升机/驾车迅速穿过一条条街道;～sb's recovery/the processing of the will 加速某人的康复/立遗嘱的进程;～production by providing better working conditions 以提供更好的工作条件来加快生产;〖同〗hasten，promote，advance;〖反〗hinder，slow，block，bar;

(3)(违章)超速行使(drive very fast in a car，etc faster than is allowed by law)[I][通常用prog]：Don't～;there's lots of time. 别超速行驶，时间富余。He was arrested for～ing. 他由于超速驾车而被捕。The policeman said that I had been～ing in a thirty-mile-per-hour area. 警察说我一直在时速限制为30英里的地区超速行驶。

speed up (v adv)(使)加快速度(vt & vi)：The workers have been asked to～up production without an increase in pay. 一直要求工人们提高生产却不给他们增加工资。The car～ed up to a hundred kilometers per hour. 那车提速到每小时100公里。

→′speeding n 超速行驶;spee′dometer n 计速表;′speedy adj 迅速的;即时的;′speedily adv 迅速地;′speediness n迅速;′speedboat n 快艇;′speed-indicator n 速度表;′speedway n 高速车道;赛车跑道;′speed-up n 加速;

【辨异】speed与hurry、quickness、rapidity、rush 和 velocity 的区别见 HURRY。