Relative to uniform inlet pressure, the distorted or actual profiles may have a rather profound effect on engine performance . 与均匀的压力分布比较起来,畸变的或真实的压力场对发动性能具有相当大的影响。
Without this shock-absorber action the piston could bounce up and down, causing erratic carburetor action and poor engine performance . 没有这个减振作用,活塞会上下窜动,引起化油器工作异常,导致发动性能变坏。