acceleration
/əkˌseləˈreɪʃən/noun
mass noun
1- increase in the rate or speed of something加速, 加快：
the acceleration of the industrialization process
工业化进程的加快
in sing. an acceleration in the divorce rate.离婚率上升。
1.1
- Physics the rate of change of velocity per unit of time【物理】加速度。
1.2
- a vehicle's capacity to gain speed within a short time（汽车的）加速性能：
the three-litre model has spectacular acceleration.
三升型车具有卓越的加速性能。