Cuon

例句：

1. 1. 铜
   金属
2. 1. The ancient Chinese civilization was heavily influenced by the development of bronze tools.
   古代中国文明深受青铜工具发展的影响。
3. 2.The copper mine in the mountains is a major source of revenue for the local government.
   山区的铜矿是当地政府的主要财政收入来源。
4. 3.The ancient Chinese people used bronze weapons to defend their country.
   古代中国人使用铜武器保卫他们的国家。