As the helicopter skims low over one of the largest undeveloped gold deposits in the world, just south of the ragtag mining town of El Dorado, the pilot shrugs bleakly.

• 当直升飞机低空掠过全球最大的未开发金矿之一时，飞行员神情黯淡地耸了耸肩。这座金矿就位于脏乱的矿业小镇埃尔多拉多南部。