资料来源 : pyDict

铸铁的,坚固的,严格的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Cast-iron \Cast"-i`ron\, a.
   Made of cast iron. Hence, Fig.: like cast iron; hardy;
   unyielding.

资料来源 : WordNet®

cast-iron
     adj : extremely robust; "an iron constitution" [syn: {iron}]