... silica-magnesia catalyst 硅镁催化剂 silicarenite 石英砂屑岩 silica-replaced fossil 硅交代化石 ...
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The secondary xylem of the original plants in local acidic environment was replaced by silica and turned into fossil woods.
处在酸性垒的原植物次生木质部组织被二氧化硅替换而成硅化木。
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