1 N-UNCOUNT 铸铁;生铁 Cast iron is iron which contains a small amount of carbon. It is hard and cannot be bent so it has to be made into objects by casting. 铸铁;生铁
2 ADJ [usually ADJ n] (保证或借口)可靠的,可信的,无懈可击的 A cast-iron guarantee or alibi is one that is absolutely certain to be effective and will not fail you. (保证或借口)可靠的,可信的,无懈可击的