Other important African export commodities are iron ore and timber, followed by manganese, cobalt, copper and chromium.

其他重要的非洲出口商品是铁矿石和木材，其次还有锰、钴、铜和铬。

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What They Do - They contain antioxidants such as Vitamin a, beta-carotene, Vitamin c, Vitamin e, selenium, zinc, copper and manganese, which are also anti-stress nutrients.

作用——上述物质含有抗氧化剂，例如维生素a、胡萝卜素、维生素c、维生素e、硒、锌、铜和锰，同时它们也是具有抗压力的营养素。

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What They Do - They contain antioxidants such as Vitamin a, beta-carotene, Vitamin c, Vitamin e, selenium, zinc, copper and manganese, which are also!

作用——上述物质含有抗氧化剂，例如维生素a、胡萝卜素、维生素c、维生素e、硒、锌、铜和锰，同时它们也是具有抗压力的营养素。

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His publicly-traded company, African Rainbow Minerals (ARM) has interests in platinum, nickel, chrome, iron, manganese, coal, copper and gold.

FORBES: South African Billionaire Patrice Motsepe Joins Giving Pledge

Patrice Motsepe is the Chairman of African Rainbow Minerals (ARM), a publicly-traded mining conglomerate which has interests in platinum, nickel, chrome, iron, manganese, coal, copper and gold.

FORBES: The African Billionaires 2013

With all the mining areas now in rebel hands, mining companies have dashed to Zaire to get at some of the richest ores in the world gold, manganese, zinc and cobalt as well as copper.

ECONOMIST: Zaire