铜蓝

例句：

1. 1. The copper mine is located in the mountainous area.
   铜矿位于山区。
2. 2. The blue sky was a beautiful contrast to the gray clouds above.
   蓝色的天空与上方灰色的云朵形成了美丽的对比。
3. 3. The copper coins were made by ancient Chinese artisans.
   这些铜币是由古代中国的工匠制作的。