SPEEDhow fast something moves or is doneRELATED WORDSsee alsoFASTSLOW1 how fast something moves or is done 某物移动或某事完成的速度speed /spiːd/ [countable/uncountable noun] The train's designers claim it is capable of attaining speeds in excess of 350 kph. 该火车的设计人员称车速能达到每小时350公里以上。 sensors which monitor speed and body movement 监测步速和人体运动的感应器speed of What was the speed of the car at the time of the accident? 那汽车出事的时候车速是多少？ the internal processing speed of a computer 电脑的内部处理速度at a speed of 50 mph/10 metres per second etc The Earth moves round the Sun at a speed of 30 km per second. 地球以每秒30公里的速度绕太阳运行。at a constant/steady speedkeeping the same speed all the time 以恒定/稳定的速度 Keep driving at a constant speed until I tell you differently. 保持恒速行驶，直到我另有吩咐。top speedthe fastest speed that a car, plane etc can reach 最高速度 The Ferrari Testarossa has a top speed of 188 mph. 这辆法拉利“红头”最高时速达188英里。rate /reɪt/ [countable noun]how fast things happen, change, or develop 〔某事发生、改变或发展的〕速度，速率at a faster/slower/different etc rate Individual children develop physically and emotionally at different rates. 每一个儿童在生理上和情感上的发展都速度不一。at an alarming ratevery fast 以惊人的速度 Our money was running out at an alarming rate. 我们的钱花起来速度惊人。rate of The amount of light available will determine the plant's rate of growth. 光照决定植物的生长速度。 equipment that can load ships at a rate of 5000 tonnes a day 以一天5,000吨的速度装船的设备pace /peɪs/ [countable noun usually singular]how fast someone walks or runs, or how fast they work or do things 步速；〔工作或做事的〕速度，步伐at a brisk/steady/gentle etc pace The soldiers were marching at a steady pace. 士兵们正在稳步行进。at a leisurely paceat a slow comfortable speed 以悠闲的步伐 We climbed at a leisurely pace, stopping occasionally to enjoy the view. 我们悠闲地爬着山，不时停下来欣赏风景。pace of The pace of political change has been rapid. 政治改革步伐迅速。pace of work/life I'm enjoying the relaxed pace of life of Jamaica. 我喜欢牙买加这种休闲的生活节奏。at your own paceat a speed that is right for you 以适合自己的速度 The Kumon method involves students learning at their own pace. 公文教育法让学生以自己的步伐学习。velocity /vɪˈlɒsəti, vəˈlɒsətiǁvˈlɑː-/ [countable/uncountable noun]the speed at which something moves in a particular direction - use this especially in technical contexts 〔沿一定方向移动的〕速度〔尤用于科技方面〕 This instrument is used for measuring wind velocity. 这个仪器用于测风速。velocity of an experiment to try to predict the velocity of a moving object 测算运动物体速度的一个实验high velocity a beam of high velocity electrons 高速电子束momentum /məʊˈmentəm, mə-/ [uncountable noun]the force that makes a moving object keep moving 〔使运动物体继续运动的〕动力，冲力 We are trying to measure the position and momentum of an electron as accurately as possible. 我们在想办法尽可能精确地测出电子的位置和动力。gain/gather momentummove faster 加速 As the slope got steeper, the sled gathered momentum. 坡道越来越陡，雪橇的速度也越来越快。lose momentummove slower 减速 The ball was moving along, slowly losing momentum on the bumpy ground. 球向前滚动着，在凹凸不平的地面上慢慢减速。miles per hour/metres per second etc /ˌmaɪlz pər ˈaʊəʳ/ [noun phrase]use these expressions to say how fast something moves 每小时…英里/每秒钟…米等 The maximum speed on British motorways is 70 miles per hour. 英国高速公路上的最高车速为每小时70英里。 Sound travels through the air at about 340 metres per second. 声音以大约每秒340米的速度在空气中传播。 a propeller that revolves at a rate of 150 revolutions per minute 每分钟转速为150圈的螺旋桨