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TOEFL BNC: 17091 COCA: 19564
silica
sɪlɪkə ˈsɪlɪkə
N-UNCOUNT 硅石;二氧化硅 Silica is silicon dioxide, a compound of silicon which is found in sand, quartz, and flint, and which is used to make glass. 硅石;二氧化硅
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TOEFL BNC: 17091 COCA: 19564
TOEFL BNC: 17091 COCA: 19564
TOEFL BNC: 17091 COCA: 19564
silica
Chemical substances used for making something: acetate, acrylic, glycerine...

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