The exoplanet's atmosphere condenses out minerals such as enstatite, corundum, spinel, and wollastonite.
这颗系外行星冷凝后产生矿物，如：顽火辉石、刚玉、尖晶石和硅灰石。
The white afrodite erosion creates the reducing of glass hardness and density,AZS corrosion creates hardness to descend,but the density to raise.
门）白泡石侵蚀后造成玻璃度和密度下降，钻刚玉侵蚀后造成度下降，但是密度却有所上升。
The results have shown that the brown alundum coatings are high-class neutral refractory coatings and are used with success in iron and steel cast-ings.
试验结果,所研究棕刚玉涂料是一种优质中性抗粘砂涂料,适用于粘土砂、水玻璃砂及树脂自砂铸型和型芯.
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Ruby and sapphire, for example, are actually the same mineral, called corundum, with a chemical formula of two aluminums and three oxygens.
例如，红宝石和蓝宝石实际上是同一种矿物，叫做刚玉，Al2O3。
Raindrops made of corundum, which is the material that rubies and sapphires are made of.
刚玉制成的雨滴，刚玉是红宝石和蓝宝石的材料。
Rubies are a gem-quality version of a mineral known as corundum.
红宝石是刚玉矿物中的一种宝石级品种。
Sapphire is also a form of corundum.
蓝宝石也是刚玉的一种。
What makes a ruby a ruby instead of normal corundum are impurities in the crystal from the element chromium.
使红宝石成红宝石而非普通刚玉的原因，在于其晶体中掺杂的铬元素。
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划词翻译
详细解释
冷凝后产生矿物，如：顽火辉石、刚玉、尖晶石和硅灰石。
度和密度
,所研究
Al2O3。
红宝石而非普通
