The exoplanet's atmosphere condenses out minerals such as enstatite, corundum, spinel, and wollastonite.
这颗系外行星的大气冷凝后产，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的下降，钻刚玉侵蚀后造成度下降，但是密度却有所。
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.
试验结果表明,所研究的棕刚玉涂料是一种优质的中性抗粘砂涂料,适用于粘土砂、水玻璃砂及树脂自砂的铸型和型芯.
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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，红和实上种矿物，叫做刚玉，化学式为Al2O3。
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，如：顽火辉石、刚玉、尖晶石和硅灰石。
度和密度的下降，钻
。
和
上
种矿物，叫做
