But more modern builders stopped using copper and copper alloys. They cost more than other building materials.

但是现代建筑师已不再用铜和铜合金，因为它们比其他建筑材料都要贵。

Keevil says earlier generations of builders in the United States also knew this about copper. That is why copper alloys such as brass were often used in building materials.

基维尔说美国早期的建筑师们也知道铜的这种用法，因此黄铜等铜合金常被用做建筑材料。