But certain stars, called pulsars, give off regular pulses of radio waves.

但有些恒星，所谓的脉冲星，会有规律地发出射电波脉冲。

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Alien life, he will suggest, is almost certain to exist in many other parts of the universe: not just in planets, but perhaps in the centre of stars or even floating in interplanetary space.

他认为，外星生物，几乎肯定存在于宇宙的某个角落，不光是在行星上，还有可能存在于恒星的中心，甚至漂浮在星际空间。

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But the IEA portends this sort of growth only if certain stars align.

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But wind or no wind, he is certain that Royal County Down will present the stars of the future with a stiff test on Saturday and Sunday.

BBC: US star lauds Royal County Down

Yes, movie stars come with a certain amount of built-in publicity and fan bases but those things come at a price.

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