我们可以改良供暖系统和发动机，使燃料更充分地燃烧。
We can develop heating systems and engines which burn fuel more efficiently.
为了使成本较低，黑骑士采用的系统和发动机均与人为驾驶的布莱德雷战车相似。
To keep costs low, the Black Knight shares a weapons systems and engine parts with the manned Bradley Fighting vehicle.
试验系统包括真空模拟系统，供电系统，推进剂供给系统，参数测量系统和发动机本体。
The experimental system includes a vacuum simulation section, power supply section, propellent feed section, parameter measurement section and an arcjet.
应用推荐