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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The fact that Cruise, a 53-year-old action star, insisted on doing it by himself instead of using a stunt double makes the scene more pulse-pounding.

事实上，53岁的阿汤哥为了让这场戏更加刺激好看，坚持不用特技替身自己完成了这组高危动作。

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Miss Leavitt found that the rate depends on the star's total light output (luminous Cepheids pulse more slowly than feeble ones) a discovery that allows them to be used for cosmic surveying.

ECONOMIST: Twirls and swirls from outer space