specific impulse

specific-impulse的词性：
n.（名词）

1. A performance measure for rocket propellants that is equal to units of thrust per unit weight of propellant consumed per unit time.Also called specific thrust
比冲：单位时间消耗单位质量推进剂率所发出的推力，它用于衡量火箭发动机性能的效率也作 specific thrust