sponge metal

例句：

1. 1. The new car uses a type of sponge metal that is lighter than steel.
   这款新车使用了比钢轻的海绵金属。
2. 2.The scientist discovered a new way to produce sponge metal using renewable energy sources.
   科学家发现了一种使用可再生能源生产海绵金属的新方法。
3. 3. The sponge metal was used in the construction of buildings with high-rise structures.
   海绵金属被用于建造高层建筑的结构中。