Complex, vast, and multidisciplinary, chemicalpropulsion has been the subject of extensive investigation over the past few decades.
复杂，巨大，和多学科，化学的推进力是在过去的几十年广泛的调查的主题。
2
Orbit maneuver hydrogen-oxygen thruster based on gas dynamic resonance igniter is a novel chemicalpropulsion technology especially prospective in space station application.
结合气动谐振点火器进行头部设计的氢氧变轨火箭发动机是一项新颖化学火箭推进技术，尤其适于空间站应用。
3
One might think that fusion propulsion requires some exotic fuel to propel a rocket a million-or-so-times more energetically than standard chemical fuels.