English ⇄ Chinese

rapidly cooled iron
met.	快速冷却铁 (With only 1 per cent silicon the cast iron tends to be white, while with about 3 per cent silicon, even rapidly cooled irons are grey. 仅含有1%硅的铸铁有白口倾向；而含有约3%硅的铸铁，即使快速冷却，断口也是灰色的。)