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Obsidian

[əb'sɪdɪən]

解釋/意思:

(noun.) acid or granitic glass formed by the rapid cooling of lava without crystallization; usually dark, but transparent in thin pieces.

艾德琳校對--From WordNet

解釋/意思:

(n.) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

加勒特錄入

解釋/意思:

n. a natural glass—the vitreous condition of an acid lava.

手打:波莉

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