metallurgy of rare metals

例句：

1. 1. The study of metallurgy is essential for the development of newmaterials.
   金属学的研究对于新材料的发展至关重要。
2. 2.The metallurgist works with high-quality raw materials to produce valuable metals.
   冶金学家使用高质量的原材料生产有价值的金属。
3. 3. Metallurgy has revolutionizedthe way we produce and use metals.
   冶金学已经彻底改变了我们生产和使用金属的方式。