这个弧形主要是由多环芳烃的有机物构成的在云的表面发光。
This arc is made up primarily of organic compounds called polycyclic aromatic hydrocarbons, which glow on the surface of the cloud.
这个弧形主要是由多环芳烃的有机物构成的在云的表面发光。
This arc is made up primarily of organic compounds called polycyclic aromatic hydrocarbons, which glow on the surface of the cloud.
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