speed
单词辨析：
普通用词，指交通工具等运动的速率或事情发生的速度。
The train went by at high speed.
火车疾驶而过。
This new plane can reach a speed of 900 kilometres an hour.
这架新飞机的时速可以达到900公里。
We had to increase the speed of delivery.
我们必须加快送货速度。
指人步行的速度，常引申为生活、变化等的速度。
He quickened his pace.
他加快了步伐。
The pace of change has accelerated.
变革的步伐在加速。
In the world today, mankind is progressing at a tremendous pace.
在当今世界，人类进步一日千里。
常指某事在一段时间内发生的速度，可与 speed 换用。
His money was running out at an alarming rate/speed.
他的钱用得很快，速度惊人。
The rate/speed of economic growth has slowed down.
经济增长速度放缓了。
物理学术语，指物体沿着一定方向运动时的速度；作普通意义上的速度解时，则指高速。
The jet plane is flying at the velocity of sound.
喷气机正在以音速飞行。
The students were asked to calculate the velocity of light.
要求学生计算出光的速度。
Leopards can move with an astonishing velocity.
豹子跑起来速度惊人。
指增加速度、速率，尤指频率。
He glanced at his watch and quicken his steps.
他看了一眼手表，加快了脚步。
He felt his heart quicken when he saw Susan.
他看到苏珊时感觉自己心跳加快了。
指某事比预期更快或更早发生时，可作及物或不及物动词；指汽车或人加速时，只作不及物动词。
The urbanization process continued to accelerate.
城市化进程持续加快。
The bad weather accelerated our departure.
坏天气促使我们提前离开。
Her car accelerated smoothly away.
她的车平稳地加速离开。
That runner accelerated suddenly around the bend.
那名赛跑运动员在转弯处突然加速。
多指意外、糟糕之事使某事加速，或让某事提前发生。
His departure was hastened by an emergency.
由于一个突发事件，他提前走了。
His letter hastened the course of the enquiry.
他的来信加快了调查的进程。
Poor medical treatment hastened his death.
糟糕的治疗加速了他的死亡。
指催促某人做某事。
Sorry to rush you, but the board needs these materials by Thursday.
很抱歉催你，只是董事会周四之前需要这些材料。
He felt he was being rushed into making a decision.
他觉得自己是被催着去作决定。
指加快某事的发生、进展等，常指好事。
This incident should speed his decision.
这一事件应该会促使他尽快作出决定。
This new medicine should speed her recovery.
这种新药应该会加快她的康复。
The new measures will speed up the registration process.
这些新措施将加快注册过程。
相关例句：
Every bank pays close attention to the speed and accuracy of its staff.
每家银行都非常关注雇员的工作速度和无差错率。
I had already taken steps to speed up a solution to the problem
我已经采取措施加快解决该问题。
Car buyers are more interested in safety and reliability than speed.
购车者们更感兴趣的是汽车的安全性和可靠性，而不是它的速度。
The car is quite noisy at speed.
这辆车高速行驶时噪音很大。
He put on a burst of speed
他突然加速了。
He drove off at high speed
他驱车飞驰而去。