These days not many people use copper’s old nickname — Doctor Copper — a title earned by the red metal’s ability to indicate the health of the global economy. If the copper price was rising it meant big construction projects were under way, but copper usage is no longer confined to pipework and flashing on roofs.
如今，很少有人使用铜的旧绰号——铜博士(Doctor Copper)，这个称号源于这种红色金属能够指示manbetx app苹果 manbetx20客户端下载 健康状况的能力。如果铜价上涨，意味着大型建筑项目正在进行中，但铜的用途已不再局限于管道和屋顶防水层。
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