The resulting steel appears to achieve a combination of strength and toughness that is comparable to that of modern steels that are very rich in alloy content and, therefore, very expensive.
2019年6月六级真题（第三套）阅读 Section A
柯林斯高阶英汉双解学习词典释义
N-MASS
钢;钢铁
Steel is a very strong metal which is made mainly from iron. Steel is used for making many things, for example bridges, buildings, vehicles, and cutlery.