In order to distinguish the color, the condition of light source must be suitable.

颜色的判别必须满足一定的照明条件。

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Some inhabitants of the deep supply their own light in order to survive.

为求得生存，有一些深海居民能为自己照明。

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Some inhabitants of the deep supply their own light in order to survive.

为求得生存，有一些深海居民能为自己照明。

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