To produce the characteristic greenish glow, the energetic particles excite oxygen atoms at altitudes of 100 kilometers or more.
高能粒子激发100千米或更高处的氧原子，产生特有的绿色光辉。
When light of a particular wavelength is shone upon them they start to glow, emitting light of characteristic hue.
当一定波长的光线照射到它们时，它们就会开始闪烁，发出特定颜色的光。
When light of a particular wavelength is shone upon them they start to glow, emitting light of characteristic hue.
当一定波长的光线照射到它们时，它们就会开始闪烁，发出特定颜色的光。 。
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