This was quintessential Midwestern farming country.这就是典型的中西部农村。He rebuked Midwestern senators who had voted against the tariff bill.他指责投票反对过关税法的中西部参议员.I about the plane returning to California from the Midwestern town wh...
该类矿床的成矿时代多集中在晚太古代末至早元古代初期,并且具有全球性.This type of graphite deposits were formend in the Late Archaean to Early Proterozoic.冀东迁西洒河桥是太古代麻粒岩相变质岩系广泛出露的地区.Archaean era granulite facies metamorphite series are extensively outcrop...
Oxidation - reduction reactions are important in the solubilization and precipitation of iron and manganese.氧化还原反应在铁和锰的增溶和沉淀中具有重要作用.manganese peroxide二氧化锰The variety of garnet includes almandine, pyrope, magnesium - iron...