Silicosis is a disabling respiratory disease caused by inhaling silica dust, which is used in the production of glass products, optical fibers, cement, and more.

矽肺病是一种因长期吸入二氧化硅粉尘而导致的呼吸系统衰竭的疾病，二氧化硅可用于生产玻璃制品，光纤，水泥等物品。

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An LCA tracks, say, a glass jar from the initial extraction of the silica from sand through the 48 hours of cooking at 2, 000 degrees Fahrenheit all the way through its final disposal.

例如，运用LCA技术，可以对一只玻璃瓶的整个生产及使用过程进行追踪，即从其在华氏2000度高温下熔砂48小时提取硅，直至玻璃瓶被用过之后的最后丢弃的全部过程。

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Singlet and multielement lenses are available in a wide variety of configurations and materials, including glass, fused silica, sapphire, and calcium fluoride.

单谱线多元件透镜可以有不同的外形和材料，有玻璃的，二氧化硅的，蓝宝石的和钙氟化合物的。

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Obsidian is a kind of black glass formed when the heat of a volcano melts the silica material in sand.

VOA: special.2009.09.16

The company is the second largest producer of commercial silica, which is a sand-like substance used in fracking as well as glass making and chemical manufacturing.

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