单词	cast iron
释义	cast iron /ˌkɑːst ˈʌɪən / noun [mass noun] 1A 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).It had three keyholes and as many huge keys and was apparently made of cast iron reinforced with steel.... There are two other classes of cast iron which are more ductile than gray cast iron. Steel combines something of the strength of wrought iron with the malleability of cast iron. 2 [as modifier] Firm and unchangeable: there are no cast-iron guarantees... But it is reluctant to issue a cast-iron guarantee that every contract will meet its target, even though none has fallen short to date. It combines stock market growth potential with a cast-iron guarantee that savers will not lose a penny if the market volatility continues. In this sense, the individual must again decide in each case, giving a cast-iron definition of where they would draw the line.
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