经氧化—还原反应，铜渗入铁中。

By oxidation - reduction reaction, copper is cemented into the iron.

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铁首次被使用已有三千五百年历史，但直到1856年，英国工程师亨利·贝西默找到丛铁中廉价提炼钢材的方法，它才被大规模应用。

Iron was first smelted 3, 500 years ago, but it wasn't until English engineer Henry Bessemer's invention in 1856 of an inexpensive way to mass-produce steel from iron that its use skyrocketed.

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在饮食中，水果颜色越深，其铁含量就越高，这通常是正确的。

In the diet, it is generally true that the darker the fruit the higher its iron content.

《柯林斯英汉双解大词典》

So iron left to own devices in the atmosphere in the presence of a little bit of water, with the water form iron oxide.

铁在大气中，在存在,少量水的条件下，大气会开始与水结合产生氧化铁。

麻省理工公开课 - 热力学与动力学课程节选

Now in this particular reaction, I've got hydrogen gas, iron solid. Those already are elements in their most stable forms at room temperature and pressure.

特定的反应中，我有氢气,固态铁，这些都已经是,处于室温和常压下,最稳定的元素单质。

麻省理工公开课 - 热力学与动力学课程节选

It has two irons that are involved in doing the chemistry, so it includes transition metals.

反应中有两个铁原子参与,因此她还要了解过渡金属。

麻省理工公开课 - 化学原理课程节选