显然，人类是动物，并且仅仅是演化而来另一种的生物。
Obviously humans are animals, and just another creature of evolution.
而这种现象正是生物演化的重要途径。
This phenomenon is the essential method of evolution for creature.
凯伦·霍普金报道。生活在黑暗环境下的生物可能在演化过程中视力逐渐下降。
Creatures that live in the dark may lose their sight over evolutionary time.
凯伦·霍普金报道。生活在黑暗环境下的生物可能在演化过程中视力逐渐下降。
Creatures that live in the dark may lose their sight over evolutionary time.
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