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English

A remote vertebrate ancestor of primates possessed tetrachromacy, but nocturnal, warm-blooded, mammalian ancestors lost two of four cones in the retina at the time of dinosaurs.

Chinese

灵长目的一种脊椎动物远祖拥有四色视觉, 然而夜行、恒温的哺乳类的祖先在恐龙时代丢失了视网膜中4种视锥细胞中的两种。