Potosi silver

例句：

1. 1. The Potosi silver mine is one of the largest in the world.
   波托西银矿是世界上最大的之一。
2. 2.The Potosi silver was discovered by accident during a scientific expedition.
   波托西银是在一次科学探险中偶然发现的。
3. 3.The Potosi silver has been used for centuries as a symbol of wealth and power.
   波托西银被用作几个世纪以来财富和权力的象征。