hafnium sponge

例句：

1. 1. The material is made from a type of hafnium sponge.
   这种材料是由一种类型的铪海绵制成的。
2. 2.The researchers used a hafnium sponge to filter the water.
   研究人员使用一种铪海绵来过滤水。
3. 3. The hafnium sponge was used in the construction of the bridge.
   铪海绵被用于桥梁的建设。