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history of earth evolution
释义
history of earth evolution
Encyclopedia
理学
〔地质总论〕
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history of earth evolution
地球演化历史
地球形成于约45.6亿年前,历经冥古宙(约46亿~40亿年前)、太古宙(40亿~25亿年前)、元古宙(25亿~5.41亿年前)和显生宙(5.41亿年以来)等时期的无数变革,最终成为今天的面貌。
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information policy in China
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