针脚里的铜溶解之后与金分离，金沉淀在电解池底部。

The gold, detached from the copper, forms a sediment at the bottom of the cell.

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针脚里的铜溶解之后与金分离，金沉淀在电解池底部。

The gold, detached from the copper, forms a sediment at the bottom of the cell.

youdao