acceleration time of engine during start transient

例句：

1. 1. The car's accelerationtime is measured in seconds.
   汽车的加速时间以秒为单位测量。
2. 2. Therocket's accelerationtime was recorded at 10 seconds.
   火箭的加速时间为10秒。
3. 3. The projectile's accelerationtime is crucial for its trajectory.
   弹道导弹的加速时间对其轨迹至关重要。