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以碳元素为主的生物体,在地下呆了亿万年后,就变成了以氧化硅为主的石头——化石,这期间生物体经历了怎样的变化和过程?
Carbon-based organisms, hundreds of millions of years spent underground, it turned into a silica-based stone - fossils, during which organisms have undergone what changes and processes?