The exoplanet's atmosphere condenses out minerals such as enstatite, corundum, spinel, and wollastonite.
这行星的大气冷凝后产生物，如：顽火辉、刚玉、尖晶灰。
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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，玉是红宝石和蓝宝石的材料。
Rubies are a gem-quality version of a mineral known as corundum.
红宝石是玉物中的宝石级品。
Sapphire is also a form of corundum.
蓝宝石也是玉的。
What makes a ruby a ruby instead of normal corundum are impurities in the crystal from the element chromium.
使红宝石成为红宝石而非普通玉的原因，在于其晶体中掺杂的铬元素。
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划词翻译
详细解释
行星的大气冷凝后产生
物，如：顽火辉
、刚玉、尖晶
灰。
玉
为Al2O3。
玉
，
物中的
宝石级品
