low grade ore

常見例句

He also knows that big mining companies prefer mountains of low-grade ore to small, high-grade mines like his.
而且他也知道那些個(gè)大型礦產(chǎn)公司更喜歡那些低地勢的礦山，而不是他那又小又高的。
These areas had already been rejected by the industry’s giants as too costly to develop because of their complex geology and relatively low-grade ore.
這些地區(qū)地質(zhì)結(jié)構(gòu)復(fù)雜，相關(guān)的鐵礦石品位低，開發(fā)成本過高，早已被一些礦業(yè)巨頭舍棄。
Although much of the high-grade ore has been used, there remains enough low-grade ore to last for centuries.
品位高的富鐵礦已經(jīng)開采很多，品位低的鐵礦還夠開采若干個(gè)世紀(jì)。