If an object increases its velocity it is accelerating.
如果物体速度增加了，它是加速的。
2
The flame velocity of flammable gas deflagration in a large closed vessel has an accelerating process, and the pressure distribution is not homogeneous.
大型密闭容器内可燃气体爆燃的火焰速度存在着一个加速过程，压力也不是均匀分布的。
3
The calculation of fuel economy includes the calculation of uniform velocity, accelerating process, decelerating process and fuel consumption under multi-working conditions.