“铜”怎么读

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它们有哑铜的，古铜的和镀银的。They are available in polished brass, antique brass or silver-plate.萨尔瓦多每年生产10万吨纯铜。El Salvador produces 100,000 tons of refined copper annually.他用铜、不锈钢和银制造装饰性器皿。He makes decorative vessels in copper, stain...