most common metal

例句：

1. 1. The steel is the most common metal used in construction.
   钢铁是建筑中最常用的金属。
2. 2. This alloy is the most common metal used in manufacturing.
   这种合金是制造业中使用最普遍的金属。
3. 3.The most common metal for making tools is iron.
   制作工具最常用的金属是铁。