;Major copper minerals are chalcocite and covellite which tightly associate with fine pyrite.
于原
品位低，
的回
率对该的开发利用意义重大。
Major copper minerals are chalcocite and covellite which tightly associate with fine pyrite.
于原品位低，的回率对该的开发利用意义重大。
Ore minerals of Luchang-Datongchang Ag-Cu ores include chalcocite, digenite, bornite,stromeyerite and eucairite which are associated with calcite as a cement.
会理鹿厂-大钢厂银的
物
辉、蓝辉、斑、硫银、硒银及硫硒银组成，且与胶结物方解密切共生；
声明：以上例句、词性分类均
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