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cambrian /ˈkambɹiən/ n

中文：寒武纪

中文 · 寒武纪Español · CámbricoFrançais · Cambrien
Meaning：Geological period marked by the evolution of animals (appearance of mollusks, crustaceans) and the extinction of half of the marine invertebrates.
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Origin and evolution of species Origin and evolution of species

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