名词

1. 加快；增速
The acceleration of a process or change is the fact that it is getting faster and faster.

2. （汽车等的）加速能力，加速幅度
Acceleration is the rate at which a car or other vehicle can increase its speed, often seen in terms of the time that it takes to reach a particular speed.

3. 加速度
Acceleration is the rate at which the speed of an object increases.

1. the act of accelerating
increasing the speed

Synonym: quickeningspeedup

2. an increase in rate of change

e.g. modern science caused an acceleration of cultural change

3. (physics) a rate of increase of velocity