镉、铅、汞和锰的检测都表明处于正常值范围。

Tests for cadmium, lead, mercury and manganese have shown levels within the normal range.

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对海水中锰的光化学反应及其影响因素进行了研究。

The photochemical reaction of manganese in seawater and its influencing factors were studied.

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氧化还原反应在铁和锰的增溶和沉淀中具有重要作用。

Oxidation - reduction reactions are important in the solubilization and precipitation of iron and manganese.

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