冶金术

例句：

1. 1. The ancient Chinese had developed a sophisticated system of metallurgy centuries ago.
   古代中国人数百年前发展出了一套复杂的冶金技术。
2. 2. Metallurgical processes are crucial in the production of steel.
   冶金过程在钢铁生产中至关重要。
3. 3. The engineers at the factory specialize in the metallurgical treatment of waste materials.
   工厂的工程师专门从事废物处理的冶金工艺。