曾几何时，这个国家生产了世界三分之一的锡。

At one time, the country produced a third of the world's ___tin.

他把它藏在一个旧的锡盒里，放在床下。

He kept it in an old ___tin box, hiding it under his bed.

锡常用来涂层钢材以抵御腐蚀。

___Tin is often used to coat steel for protection against corrosion.