Microscopically the ores are medium grained to amorphous.显微镜下,矿石为中粒至非晶质.Iron ores of greatest economic interest contain magnetite and hematite.最具有经济价值的铁矿包括磁铁矿和赤铁矿.Ores are also being obtained in quantity from other count...
They'd mined the hillside for the ores.他们曾在这个小山坡上开采矿石.After enduring the hardship of the arduous fieldwork , the prospecting team discovered many new ores.地质勘探队员餐风饮露,历尽辛苦, 找到了不少新的矿藏.This is not always true - as with...