Weathering and pedogenesis of rocks are important sources of mineral elements for ecological systems, and key processes of global biogeochemical cycling of mineral elements.

岩石风化成土作用是生态系统矿质元素的重要来源，也是全球矿质元素生物地球化学循环的重要环节。

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Traditionally, silicon cycling is thought to be mainly controlled by rock weathering, subsequent mineral dissolution, and final aggradation in waters.

传统认为硅的循环主要受岩石风化、矿物溶解和水体沉积的影响。

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European sporting-goods companies give him free shoes and helmets, and a Romanian mineral-water company sponsors his cycling team, but that's about it.

WSJ: Blade Runner Is on a Well-Trodden Path