They are gaps in the sun's magnetic field which make a hole through the star's super-hot outer atmosphere — the corona — allowing gas to escape, according to a NASA description.

根据美国国家航空航天局的描述，他们是太阳磁场的缺口，太阳磁场制造了一个穿透这颗恒星外层大气的空洞—日冕，允许气体逃脱。

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Finally, the outermost part of a star's atmosphere is the corona, which if super-hot might be linked with convection in the outer layers.

最后，恒星大气的最外层部分是日冕，这是一个由于外层对流导致的超热区域。

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It was a hot, humid, sun-flushed afternoon in Dar es Salaam, the sprawling Tanzanian port city, and there was an atmosphere of near crisis as the train pulled in.

在坦桑尼亚散漫铺陈的港口城市达累斯萨拉姆，一个炎热，潮湿，阳光照耀的下午。当火车进站时，车站里有一种几乎是大难临头的气氛。

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Number One Court can often produce an intense atmosphere but, on a roasting hot day in Paris, the match began with the steep-sided stands half empty as spectators went in search of shade and refreshment after the preceeding men's match.

BBC: Anne Keothavong falls at first French Open hurdle