Something in addition to the iron on Earth's surface must have absorbed much of the oxygen produced by plant life.

除了地球表面的铁以外，一定有什么东西吸收了植物产生的大量氧气。

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As a way of reconciling these two facts, scientists have hypothesized that nearly all of the oxygen being produced was taken up by iron on Earth's surface.

为了调和这两个事实，科学家们假设，几乎所有产生的氧气都被地球表面的铁吸收了。

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The iron on?

铁门打开了吗？

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Other signs are red marks on the skin, feelings of extreme tiredness and lack of iron in the body.

VOA: special.2009.04.14

On the back of it, an iron bed and a chair and table were tied, and on top of them a crate of Barred Rock chickens."

车尾绑著一张铁床、椅子和桌子，上面还有一箱芦花鸡，“

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Let's choose Latin, the language of scholarship, and so iron became Fe for ferrum and lead became Pb for plumbum and gold is Au for aurum and so on.

那就选拉丁文吧，用于学术的语言，所以，iron就变成了Fe，表示铁元素,铅变成了，Pb，表示铅元素,金变成了Au，表示金元素，等等。

麻省理工公开课 - 固态化学导论课程节选

The result was that the nail could attract little bits of iron on a table thanks to the magnetic field.

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Fowler hit a driver and a 5-iron on the third hole.

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If the ratio of magnesium and iron on the moon conforms with scientists' predictions it will provide evidence that the moon really is a chip off the old block.

ECONOMIST: Astronomy