speed /spi:d/ I. n.［c］&［u］ 速度，速率：drive at full/top speed 以全速驾驶；travel at a speed of thirty miles an hour 以每小时30英里的速度行驶；put on speed 加快速度More haste, less speed.［谚］欲速则不达。The car ran with all speed. 汽车全速行驶。‖II. vi. & vt. (sped /sped/, sped) 速进，急行；促进: speed the construction pace 加快建设步伐  He sped down the street.他沿街急行。speed (sth.)up (此时speed的过去式、过去分词常用speeded 形式)  增加…的速度：The train soon speeded up.火车不久就加速前进。They have speeded up production. 他们业已加速生产。