copper rod

例句：

1. 1.This is the copper rod that was used to fix the roof.
   这是用来固定屋顶的铜棒。
2. 2. The copper rod is too heavy for me to lift.
   这根铜棒太重了，我举不起来。
3. 3.He used a copper rod to saw through the wooden door.
   他用一根铜棒锯开了木门。