常见例句The SERN of a hypersonic vehicle was designed for improving the lift and propulsion force. 摘要为了提升高超声速飞行器单壁膨胀喷管的升力和推力，对其进行了优化设计。single-expansion-ramp nozzle (SERN) 单壁扩张喷管Māsern 麻疹,疹子 返回 Serning