nickel-copper ratio

例句：

1. 1.The steel industry uses a significant amount of nickel and copper in its production processes.
   钢铁工业在其生产过程中大量使用镍和铜。
2. 2.The engineer calculated the nickel-copper ratio to optimize the material's properties.
   工程师计算了镍铜比以优化材料的性能。
3. 3. The research team found that the nickel-copper ratio was crucial for the alloy's strength.
   研究团队发现镍铜比对合金的强度至关重要。