... aurora borealis 北极光 auroral a. 极光的 aureole n. (神像画中头部或身体周围的)光环,光轮,(日月等的)晕,晕轮 ...
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极光的出现缘于太阳风离子与高层大气中的氧氮原子的碰撞。
Auroras happen when ions in the solar wind collide with atoms of oxygen and nitrogen in the upper atmosphere.
随着9月23日秋分的来临，夜晚越来越长，观测北极光的最佳季节开始了。
As the September 23rd equinox approaches, nights grow longer and a favorable season for aurora begins.
北极光的出现是，当太阳发射出带电的微粒子飞越地球时所产生的光线。
The ribbons stretch from one end of the Northern Lights appear when the sun sends charged particles flying toward Earth.
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