单词 | natural glass |
释义 | natural glass (once / 1969886 pages) n WORD FAMILY natural glass USAGE EXAMPLESOn the one hand, some are completely vitreous, like obsidian, which is a natural glass. Various, Encyclopaedia Britannica, 11th Edit...(2011) This natural glass, in fiery shades of brown, black or blood red, resulted from flowing volcanic lava millions of years ago. New York Times(Mar 17, 2011) n magma of any composition that cooled very rapidly Hypo|Hyper crystal, lechatelierite, quartz, quartz glass, vitreous silica colorless glass made of almost pure silica tektitethought to derive from meteorites glass a brittle transparent solid with irregular atomic structure |
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