The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.The seven leading bauxite exporters formed the International Bauxite Association...
Pack ice around Iceland was becoming a threat to navigation.冰岛周围的浮冰群曾一度对船只航行构成威胁。iceland agate黑曜岩, 玻质岩Overcast skies portend a rough day for boats on Iceland's Lake Myvatn.阴云密布的天空为冰岛米湖上的船只预示了狂风暴雨的一天.Scotland were ah...
We need good food to nourish the starving infants.我们需要好食品滋养这些挨饿的婴儿....microbes in the soil which nourish the plant.土壤中为植物提供营养的微生物They nourish animus to us.他们对我们怀有敌意。Journalists on the whole don't create public opini...