manganese lead casting brass

例句：

1. 1. Manganese is a metal that is found in the earth's crust.
   锰是一种存在于地球地壳中的金属。
2. 2.The steel industry uses manganese to improve its strength and durability.
   钢铁工业使用锰来提高其强度和耐用性。
3. 3. Manganese is essential for the human body as it helps in the production of red blood cells.
   锰对人体至关重要，因为它有助于生产红细胞。
4. 1.Lead is a heavy metal that is used in many industrial processes.
   铅是一种在许多工业过程中使用的重金属。
5. 2. The children were led away by their parents.
   孩子们被他们的父母领走了。
6. 3. Lead is highly toxic and can cause serious health problems if ingested.
   铅非常有毒，如果摄入会引发严重的健康问题。
7. 1. The potter casts her creations from clay.
   陶工从黏土中塑造她的创造品。
8. 2. The forge is where iron is heated and then cast into bars.
   锻炉是加热铁并将其铸成条状的地方。
9. 3. The artisan has perfected the casting technique for his sculptures.
   这位艺术家已经完善了他的雕塑的铸造技术。
10. 1. Brass is a popular material for making jewelry because of its durability and shine.
    由于其耐用性和光泽，黄铜是制作珠宝的流行材料。
11. 2. The ancient Romans used brass for building their temples.
    古罗马人用黄铜建造他们的神庙。
12. 3. Bronze was often used as an alternative to brass in ancient times.
    青铜在古代常常作为黄铜的替代品。