The unmanned space vehicle — inspired by nuclear pulse propulsion studies by the British Interplanetary Society in the 1970s — will ideally reach its target star within 100 years after launch.

这艘无人航天器——灵感来源于20世纪70年代英国星际学会研究的核脉冲推进——理论上讲在发射后100年内抵达其目标恒星。

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Meanwhile, the company that pioneered much of today's electric-vehicle knowhow, AC Propulsion of San Dimas, California, has steered clear of permanent-magnet technology.

与此同时，引领当今电动车辆专业技术潮流位于加利福尼亚州圣迪玛斯的AC Propulsion公司已经对永磁技术作出明确表态。

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In contrast to conventional trains, the propulsion system for the Transrapid is not mounted in the vehicle but in the guideway.

跟传统列车不同，磁浮列车的驱动系统不安装在车辆上，而是在导向轨上。

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One fuel-cell factory, however, could make propulsion systems for every size and shape of vehicle.

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Just as with Apollo, any modern venture would need some kind of CSM element for the astronauts, together with a departure stage - a propulsion unit that could accelerate the astronauts' vehicle out of low-Earth orbit, putting it on a path to the Moon.

BBC: Manned flight around Moon considered

In fact, when mission managers in the control room at the Jet Propulsion Laboratory first get word early Monday that the craft has reached the top of the Mars atmosphere, the vehicle will have been safe or smashed on the surface for at least seven minutes.

WSJ: NASA's Robot Lab Curiosity Nears Mars