tung

例句：

1. 1. The old house was made of bricks and mortar, but the new one is all tung.
   那所旧房子是用砖石建造的，但新的房子全是铜制的。
2. 2. The copper wire was so thin that it could not hold a light bulb.
   那条铜线太细了，连一个灯泡都挂不住。
3. 3. Copper is used to make coins and other metal objects.
   铜被用来制造硬币和其他金属制品。