Darker soils are often rich in iron and aluminum oxides, and are typical of highly weathered soil that forms in hot, humid climates.
而深色的土地通常是富含铁和氧化铝，是在湿热气候下形成的典型的高度风化的土壤。
Darker soils are often rich in iron and aluminum oxides, and are typical of highly weathered soil that forms in hot, humid climates.
而深色的土地通常是富含铁和氧化铝，是在湿热气候下形成的典型的高度风化的土壤。
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