He also knows that big mining companies prefer mountains of low-grade ore to small, high-grade mines like his.

而且他也知道那些个大型矿产公司更喜欢那些低地势的矿山，而不是他那又小又高的。

youdao

Guinea contains the world's largest reserves of bauxite and its largest untapped reserves of high - grade iron ore.

几内亚拥有世界上最大的铝土矿储量，并且拥有世界上最大的未被开发的高品质铁矿石矿藏。

youdao

The Shuiyindong gold deposit, which occurs in the Longtan Formation of the Upper Permian series, is a super-large, high-grade gold ore deposit.

黔西南水银洞金矿为产于上二叠统龙潭组中的超大型、高品位金矿床，矿床由多个金矿体组成。

youdao

Copper-market analysts believe that Zaire's high-grade ore could help create a world surplus of copper by the end of the decade, and bring prices down heavily.

ECONOMIST: Zaire