raw metal

例句：

1. 1. The raw metal was melted down to make the new machine.
   原始金属被熔化以制造新机器。
2. 2.The raw metal was then refined and hammered into a smooth surface.
   然后，原始金属被精炼并锤打成光滑的表面。
3. 3.The raw metal was used to make tools and weapons for centuries.
   原始金属被用来制作工具和武器几个世纪。