a valuable or useful chemical substance that is formed naturally in the ground

a chemical that your body needs to stay healthy

A healthy diet should supply all necessary vitamins and minerals. 一份健康的饮食应该提供所有必要的维生素和矿物质。

a mineral supplement 补充的矿物质

cold, sweet fizzy drinks (= ones with bubbles) without alcohol

being or consisting of a mineral or minerals

a mineral deposit (= substance or layer that is left) 矿层

The speaker emphasized that much of South Africa's importance lay in its mineral wealth. 发言者强调说南非的重要性很大程度在于它丰富的矿藏。