1. A magnesia-rich sedimentary rock resembling limestone. 
   白云灰岩一种似石炭岩，富含氧化镁的沉积岩
2. A white, yellowish, or brown mineral, magnesium carbonate, MgCO3, used in the manufacture of magnesium oxide and carbon dioxide. 
   菱镁矿一种白色、浅黄色或棕色的矿物，碳酸镁，mgco3，用于生产氧化镁和二氧化碳
3. A substance, such as magnesia or sodium bicarbonate, that neutralizes acid. 
   解酸剂，抗酸剂，防酸剂一种中和酸的物质，如氧化镁或碳酸氢钠
4. a milky white liquid suspension of magnesium hydroxide; used as a laxative and antacid. 
   氢氧化镁中的一种奶白色的液体悬浮物；用来放松和抗酸的药剂。
5. Soil that is rich in iron, alumina, or silica and formed in tropical woodlands under very humid climate with relatively high temperature. 
   砖红壤富含铁质矾土或二氧化硅的土壤，分布于气候湿润、具有相对高温的热带林区

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• 1. magnesia brick
  氧化镁 magnesia...氧化镁砖 magnesia brick...氧化镁烧结物 magnesia clinker
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