They struck a rich seam of iron ore.

他们开出一个富铁矿层。

It does not cost much to scrape it up, and the expense comes in moving costs from mine to market. Even so, Australia can produce iron ore for $25 a tonne.

开采成本本身不高，而且外部投资正在将成本从矿山转移到市场。即便如此，澳大利亚可以以每吨25澳元的价格成本生产铁矿石。

Smaller mills buy iron ore on the spot market.

较小的钢厂在当地市场上购买铁矿石。

Iron ore is used in steelmaking.

铁矿用于生产钢铁。

All will need iron ore.

这些都需要铁矿石。