Born in the heart of an exploding supernova star,
产生于超新星爆炸
Iron forms the earth's molten core,
铁构成了地球的熔融核心
Larger than the moon, hot as the sun.
比月亮大 炽热如太阳
Without it, no atmosphere, no magnetic field,
没有铁 就没有大气层 没有磁场
No life.
没有生命
The fourth most common mineral in the earth's crust.
它是地壳中第四种最常见的矿物质
After depending on bronze for so long,
很长时间人类依赖青铜器
iron was a far superior metal,
铁器比青铜器更胜一筹
but it took a much higher level of skill to work with it.
但需要更高水准的技术来锻造
To forge iron, a super-fuel:
冶炼铁需要一种超级燃料
Charcoal, wood burned in kilns,
就是窑炉烧出来的木炭
More carbon, more energy,
碳元素越多 能量越大
Burns hotter, longer.
温度更高 燃烧更持久
They needed to smelt it,
为了熔炼出铁
to get that ore into a position
工人把铁矿石放在适当的地方
where it would interact with charcoal,
以便与木炭相互作用
and great groaning bellows would push air into this fire.
巨大的鼓风机往火炉里推送空气
The heat would infuse the iron,
高温熔化铁矿石
and it would coagulate into these chunks.
然后凝结成块状