A heme (HEM) is a multi-atom, non-proteinaceous organic structure capable of positioning an iron (FE) ion in its center.

亚铁血红素 (HEM) 是一个多原子、非蛋白质的有机结构，能够将一个铁 (FE) 离子置于其中心。

youdao

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。

youdao

The Fe content, metallization and iron recovery of the product are 90%, 92% and over 84%, respectively.

所得产品的铁品位、 金属化率和铁回收率分别在90％、92％和84％以上。

youdao

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。

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Rust is the metal (Fe for iron) turning to the oxide (Fe2O3 normally for iron although there are other oxides).

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The grey stands in contrast to the weathered red outer-coating of the Sheepbed unit, and the darker colour hints at a different oxidation state for iron (Fe) minerals that might be inside the rock.

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