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The compositions of phyllosilicate and iron oxides for several main types of soils and their corresponding iron-manganese nodules were studied by the means of XRD.

以我国几种常见土壤及相土壤铁结核用X-射线衍射,研究了土壤和铁结核中层状硅酸盐和氧化铁的类型组合。

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These lumpy rocks are known as manganese nodules, and they grow in underwater fields more than 3500 meters below the surface.

这些块状岩石被称为结核,它们生长在地 3500 多米的水

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The Hughes-Global Marine venture would be the development of equipment that could gather nodules of manganese and other minerals that accumulated around sediment on the ocean floor.

Hughes-Global Marine 业将开发可收集的设备在海底沉积物周围堆积的结核和其他矿物质。

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