copper segment

例句：

1. 1.Copper is a soft metal that is often used in electrical wiring.
   铜是一种柔软的金属，常用于电气线路。
2. 2. The copper pipe runs through the entire building.
   铜管贯穿整个建筑。
3. 3.Copper coins are often used for currency exchange.
   铜币常用于货币兑换。