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Born in the heart of an exploding supernova star,
產生于超新星爆炸
Iron forms the earth's molten core,
鐵構成了地球的熔融核心
Larger than the moon, hot as the sun.
比月亮大 熾熱如太陽
Without it, no atmosphere, no magnetic field,
沒有鐵 就沒有大氣層 沒有磁場
No life.
沒有生命
The fourth most common mineral in the earth's crust.
它是地殼中第四種最常見的礦物質
After depending on bronze for so long,
很長時間人類依賴青銅器
iron was a far superior metal,
鐵器比青銅器更勝一籌
but it took a much higher level of skill to work with it.
但需要更高水準的技術來鍛造
To forge iron, a super-fuel:
冶煉鐵需要一種超級燃料
Charcoal, wood burned in kilns,
就是窯爐燒出來的木炭
More carbon, more energy,
碳元素越多 能量越大
Burns hotter, longer.
溫度更高 燃燒更持久
They needed to smelt it,
為了熔煉出鐵
to get that ore into a position
工人把鐵礦石放在適當的地方
where it would interact with charcoal,
以便與木炭相互作用
and great groaning bellows would push air into this fire.
巨大的鼓風機往火爐里推送空氣
The heat would infuse the iron,
高溫熔化鐵礦石
and it would coagulate into these chunks.
然后凝結成塊狀
