metallic element

例句：

1. 1.The discovery of gold in the mine is a significant milestone in the history of metallurgy.
   矿中发现金是冶金史上的一个重大里程碑。
2. 2. The research on the properties of metallic elements has greatly improved our understanding of materials science.
   对金属元素的性质的研究极大地提高了我们对材料科学的理解。
3. 3.The use of metallic elements in construction has become increasingly popular due to their durability and strength.
   由于其耐用性和强度，使用金属元素在建筑中的应用越来越受欢迎。