The steel is one of the only materials that we can mark with color, and that's due to the fact that the steel is ferrous, which means it contains iron.

钢是我们唯一可以刻出颜色的材料之一，这是因钢是黑色的，这意味着它含有铁。

By adding the FeADC to the cancer drug, the drug was essentially switched off until it came in contact with ferrous iron in the tumor.

通过在抗癌药物中加入FeADC，药物基本上是被关闭的状态，直到它接触到肿瘤中的亚铁。

And he found that ferrous sulfite, when rubbed over it, would make it appear.

他发现当将亚铁硫酸盐涂抹其上时，它就会显现出来。

Ferrous meaning iron  and so you're thinking oh well some must have like liver or beans or some other iron rich food, you'd  be wrong.

含铁的意思是含有铁， 所以你可能会想， 哦，那里面肯定有肝或者豆类或者其他富含铁的食物，你就错了。

Despite his condition, he had a contractual obligation to finish a set of ferrous metal sculptures for a prominent art show.

尽管身状况不佳，但他有合同义务一场著名的艺术展完成一组黑色金属雕塑。

And while you'll see things like  cauliflower soup or barley gruel there's also a recipe for ferrous potion.

你会看到像花椰菜汤或裸麦粥这样的东西，还有一款铁质药剂的配方。