tiě / de / róng / huà / diǎn / hěn / gāo / xū / yào / jiā / rè / dào / yì / qiān / wǔ / bǎi / duō / shè / shì / dù铁的熔化点很高,需要加热到一千五百多摄氏度。Iron has a high melting point and must be heated to more than 1,500 degrees Celsius.