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生矿物，如：顽火辉、、尖晶和硅灰。
The white afrodite erosion creates the reducing of glass hardness and density,AZS corrosion creates hardness to descend,but the density to raise.
门）侵蚀后造成玻璃度和密度的下降，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.
试验结果表明,所研究的棕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，红宝和蓝宝实际上同一种矿物，叫做玉，化学为Al2O3。
Raindrops made of corundum, which is the material that rubies and sapphires are made of.
由玉制成的雨滴，玉红宝和蓝宝的材料。
Rubies are a gem-quality version of a mineral known as corundum.
红宝玉矿物中的一种宝级品种。
Sapphire is also a form of corundum.
蓝宝也玉的一种。
What makes a ruby a ruby instead of normal corundum are impurities in the crystal from the element chromium.
使红宝成为红宝而非普通玉的原因，在于其晶体中掺杂的铬元素。
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划词翻译
详细解释
、
、尖晶
度和密度的下降，
同一种矿物，叫做
为Al2O3。
玉
红宝
和蓝宝
