Evidence of iron making has been found in Nigeria, Ghana, and Mali.

在尼日利亚、加纳和马里发现了炼铁的证据。

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Knowledge of iron making penetrated into the forest and savannahs of West Africa at roughly the same time that iron making was reaching Europe.

大约在制铁技术传到欧洲的同时，西非的森林和大草原上也开始有了制铁的知识。

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She says their latest findings should settle any question about the value of making sure every pregnant woman receives iron supplements.

VOA: special.2011.01.05

The likelihood of Iron Man 3 coming close to matching the super team-up movie are low, since that would require the third Iron Man film making as much money domestically as Iron Man 2 took in worldwide.

FORBES: Connect

Factories making iron (for weaponry) and glass (for the manor houses that were replacing dark castles) needed lots of it.

FORBES: Magazine Article

By making Iron Man 3 as a U.S.-China coproduction, Disney would collect a 38% cut of the box office as befits a domestic film.

FORBES: Hollywood's Secret Weapon To Combat Piracy In China