The Global UV Index, from low (green) to extreme (purple)
全球紫外线指数，从低（绿色）至极高（紫色）
The lead researcher says that the animals may have evolved ways of protecting their retinas against the kind of extreme exposure to UV light common in the Arctic.
首席研究员表示，这种动物不断进化，可以保护他们的视网膜免受北极常见的紫外线的伤害。
The lead researcher says that the animals may have evolved ways of protecting their retinas against the kind of extreme exposure to UV light common in the Arctic.
首席研究员表示，这种动物不断进化，可以保护他们的视网膜免受北极常见的紫外线的伤害。
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