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激光晶体
释
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红宝石
掺铬（Cr）的氧化铝单晶。
理学
宝石矿物
释
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红宝石
颜色为中等至深红色调的刚玉族宝石。化学组成为Al2O3。红宝石为世界五大宝石之一，与蓝宝石是世界上公认的两大珍贵彩色宝石品种。红宝石被誉为“爱情之石”，象征着热情似火，爱情的美好、永恒和坚贞。
Physics
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红宝石｛矿｝
Astronomy
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红宝石
Chemistry
＞无机化学＞无机化学基本概念与无机化合物＞释义
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红宝石
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road transportation employee
road transportation for bulky cargo
road transportation of dangerous goods
road transportation of open pit
road transportation operation permit
road transportation safety
road transport organization and management
road transport volume
roadworthiness certificate of motor vehicle
roak
Roald Amundsen
Roald Hoffmann
roaming
Roaming along the Pond
roaming reaction
Roamnce at the Turning of Five Dynasties and Northern Song
Roar, China
Roar Chinese
roaring
Roaring Flame of the Eastern Battlefield
roaring in equine
Roar! The Yellow River
roasted eel processing equipment
roasted fish fillet processing equipment
roasted green tea
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