silica content

例句：

1. 1.The glass is made from silica sand and has a high silica content.
   这个玻璃是由石英砂制成的，含有高比例的二氧化硅。
2. 2. The soil analysis showed that the silica content in the soil was very low.
   土壤分析显示，土壤中的二氧化硅含量非常低。
3. 3.The new product contains a higher silica content than the old one.
   新产品的二氧化硅含量比旧产品高。