| 单词 | 金刚砂 |
| 释义 | 〔alumina〕Any of several forms of aluminum oxide, Al2O 3, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, sapphire, and emery, used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Also called aluminum oxide 矾土，氧化铝：一种氧化铝的形式，Al2O 3，以钢石的形式存在，水合形式存在于铝土矿中，杂有各种不纯物，如红宝石、蓝宝石、金刚砂，用于制造铝、研磨剂、耐火材料、瓷器和电子绝缘物 也作 aluminum oxide〔emery〕A fine-grained impure corundum used for grinding and polishing.刚玉粉，金刚砂：用于磨粉和打光的一种细磨的不纯的刚玉粉〔Carborundum〕A trademark used for an abrasive of silicon carbide crystals.金刚砂：一种碳化硅晶体磨料的商标名 |
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