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单词	obsidian
释义	obsidianobsidian /əbˈsɪdiən/ noun [uncountable] Etymology ETYMOLOGYobsidian Origin: 1300-1400 Latin obsidianus lapis, mistake for obsianus lapis stone of Obsius, a Roman traveler said to have discovered the rock a type of dark rock which looks like glass
随便看	decay decay rate deceased deceit deceitful deceitfully deceitfulness deceive deceiver decelerate deceleration December Decembrist Revolt, the decency decent decently decentralization decentralize decentralized deception deceptive deceptively deceptiveness deci- decibel

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