saturated steel

例句：

1. 1. The steel is saturated with carbon and will not be as strong as the pure iron.
   这种钢含碳量高，不如纯铁坚固。
2. 2. The construction of this bridge required saturated steel for its main beam.
   这座桥的建设需要饱和钢作为主梁材料。
3. 3. The engineer used saturated steel to reinforce the structure's load-bearing capacity.
   工程师使用饱和钢来增强结构承受载荷的能力。