Moreover the rateofpressurechange also plays an important role in the phases of flame-spreading and chamber-filling, and should hence be accounted for in the prediction.
压力变化速率对火焰传播和燃烧室充气过程也有重要影响，应当加以考虑。
2
It is the rateofchange, the sudden onset of the pressure change, that makes the sonic boom audible.
是变化的速率和发生的突然性使得音爆可以被听见。
3
But the rateofchange and pressure on the staff can be so high that people get burned out.