A method is proposed to determine free native silver and free silver sulphide in lead-zinc concentrate.

拟定了分离测定铅锌精矿中游离硫化银和游离自然银的方法。

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The leaching solvents for the separation of silver sulfide and native silver were investigated in this test.

文中针对硫化矿物中硫化银与自然银的浸取溶剂及分离方法进行了探讨。

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Silver minerals in this mine mostly occurred as native silver embedded in quartz and shaPed into grained, schistose or tree-like structure.

发现该矿银主要以自然银的形式存在，自然银多呈粒状、片状或树枝状嵌生在石英中。

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After relocating from their native Kentucky to the Silver Lake neighborhood of Los Angeles in 1997, the twins joined blues-rock act Slydell as backup singers and began to collaborate with other musicians, including Lewis.

NPR: The Watson Twins On World Cafe