常用動詞、名詞及短語有：

accelerate (使)增加速度，加速，加快

decelerate (使)降低速度， (使)減速，減慢

retard (使)放慢， (使)減速

slow down (使)慢下來， (使)減速

speedup (使)加速， (使)加快

rate 速率；速度；快慢；變化率

speed 快；迅速；速率；速度

velocity 速度，速率

at a/the rate of ... 以…的速度(速率)

at/with a/the speed of ... 以…的速度(速率)

at/with a/the velocity of ... 以…的速度

The speed/velocity of the aircraft increases/rises．

飛機的速度加快／上升。

The speed/velocity of the fluid decreases/falls．

流體的速度減慢／下降。

The rate of descent of an aeroplane is measured in metres of height per second．

飛機下降的速率是以每秒高度米數(shù)來測量的。

The aircraft increases speed/speeds up/accelerates．

飛機加快速度。

The aircraft decreases speed/reduces speed/slows down/decelerates．

飛機減慢速度。

There is an increase in speed .

速度有所增加。

There is a decrease/reduction in speed．

速度有所減小。

Opening the throttle of a car accelerates it/makes it go faster．

打開汽車的風門能使汽車加速。

Applying the brake of a car retards it/makes it go slower．

使用汽車的剎車可使汽車減慢速度。

Light travels at a speed of 299,728 kilometres per second．

光以 299 728 公里每秒的速度傳播。

If only one pair of field poles is used in a generator , the armature must turn at a rate of 60 revolutions per second a to produce 60-cycle current．

如果發(fā)動機里只使用一對磁場極，電極必須以 60 轉(zhuǎn)每秒的速度旋轉(zhuǎn)才能產(chǎn)生 60 周的電流。

The magnet turns at the rate of 50 revolutions per second．

磁鐵以 50 轉(zhuǎn)每秒的速度旋轉(zhuǎn)。

The population of the world is growing at a dangerous rate．

世界人口正以危險的速度在增長。

In fact , there is a maximum velocity at which any object may fall freely through air, regardless of the duration of its fall．

事實上， 任何物體不論其下落的時間有多長，都有一個可通過空氣自由下落的最大速度。