iron melting pot

例句：

1. 1. The ironmelting pot is the heart of thefactory.
   铁水罐是工厂的核心。
2. 2. Theiron melting pot is used to producesteel.
   铁水罐用于生产钢铁。
3. 3. Theiron melting pot is a symbol ofinnovation and progress.
   铁水罐象征着创新和进步。