Chemicalengines process mass flows to convent differences in chemical potential into work.
化学机是经由质量流动将化学势差转换成功率的装置。
2
There is no realistic prospect for widespread electric air travel: the jet engines on aircraft need the high-energy density that only chemical fuels can provide.
广泛的以电力为驱动的空中旅行很不现实：飞机发动机需要高密度的能量，而这些只有化学燃料才可提供。
3
Chemical combustion engines are an unbeatable technology for escaping Earth's atmosphere and gravitational pull.