reclaimed copper

例句：

1. 1. The reclaimed copper was used to make new electrical wiring.
   回收的铜被用来制作新的电线。
2. 2.The old copper pipes were replaced with new ones to improve the water quality.
   旧的铜管被替换为新的，以改善水质。
3. 3. Reclaimed copper is a sustainable alternative to traditional mining methods.
   回收铜是传统采矿方法的可持续替代方案。