1·However, from what I gather, "hybrid" rocket engines use both solid and liquid or gas propellants.
然而我的理解是，“混合动力”火箭引擎同时使用固体燃料和液态或气态推进剂。
2·Typical Assignment: Test burn rates of new propellants.
典型的任务：测试新的推进剂的燃烧率。
3·This is true of almost all aerosol propellants.
几乎所有的气雾剂推进剂都是这样。
4·Nitrogen's properties benefit applications such as heat treating atmospheres, blanketing atmospheres, propellants, pneumatics, purging and pressurizing, and analytical carrier gases.
氮的性质使许多应用受益，如热处理气氛、覆盖气氛、推进剂、气体力学、净化和加压以及分解运载气体。
5·The results show that the cumulative damage of propellants under the different stress levels agrees with linear rule.
结果表明，在不同应力水平下，推进剂的累积损伤基本符合线性累积损伤规律。