Copper, brass, and aluminium are separated and remelted for reuse.

铜、黄铜和铝被分门别类重新熔化以供再利用。

《柯林斯英汉双解大词典》

Brass is an alloy of copper and zinc.

黄铜是铜锌合金。

《牛津词典》

Copper and zinc are fused to make brass.

铜与锌熔合后形成黄铜。

youdao

When they have removed all the dirt, they are down to the brass tacks, the copper pieces that hold the boat together.

VOA: special.2010.05.16

Many carry tridents and spears, but most carry kamandals - small brass or copper pitcher for carrying the holy Ganges water.

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Many French horns, for example, are made of nickel silver, an alloy of copper, zinc, and nickel (it's silver in name and color only), and some are made of nickel bronze, an alloy of copper, tin, and nickel. (Brass itself is an alloy of copper and zinc.) Many brass instruments are silver-plated (sterling silver on brass), and some are gold-plated.

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He's paid for all his copper and brass up front - only to find that he's left holding a lot more stock than expected.

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