An important mineral substance (the dioxide of silicon), which in the form of quartz enters into the composition of many rocks, and is contained in…
| 单词 | θ68948 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > specific elements > silicon > [noun] > compounds > silicas (2) silica1801 An important mineral substance (the dioxide of silicon), which in the form of quartz enters into the composition of many rocks, and is contained in… Subcategories:— silica gel (1) |
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