... 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.
“尖端”结构是形成著名的极光的原因,而极光的出现让高纬度的地区更加明亮。
The cusp is responsible for the famous auroras that grace high latitudes.
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