英语词汇“corundum”是什么意思，“corundum”的读音、用法及例句翻译-烛光网

词汇	corundum
释义	co·run·dum AHD[kə-rŭnʹdəm] D.J.[kəˈrʌndəm]K.K.[kəˈrʌndəm]n.（名词） An extremely hard mineral, aluminum oxide, Al₂O ₃, sometimes containing iron, magnesia, or silica, that occurs in gem varieties such as ruby and sapphire and in a common black, brown, or blue form used chiefly in abrasives. 刚玉：一种极为坚硬的矿物，氧化铝，Al₂O ₃，有时含铁、氧化镁或硅土，存在于各种宝石中，如红宝石、蓝宝石，并且在磨蚀剂中以普通的黑色、棕色或蓝色形式出现 Etymology语源 Tamil kuruntam 泰米尔语 kuruntam
随便看	pontificating pontifices pontifices pontil pontils pontine Pontine Marshes Pontius Pilate Pont l'Évêque Pont l'Évêques ponton bridge pontonier pontoniers pontoon pontoon bridge pontooned pontooning pontoons Pontoppidan Pontus ponty Pontypool pony pony express ponying

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