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1. Oxford Dictionary

   cast iron

   • IPA[ˌkɑːst ˈʌɪən]

   英式

   • n.
     a hard, relatively brittle alloy of iron and carbon which can be readily cast in a mould and contains a higher proportion of carbon than steel (typically 2–4.3 per cent).；firm and unchangeable

   • noun: cast iron

2. • 釋義

   n.

   名詞

   • 1. a hard, relatively brittle alloy of iron and carbon which can be readily cast in a mould and contains a higher proportion of carbon than steel (typically 2–4.3 per cent).
   • 2. firm and unchangeable there are no cast-iron guarantees