Sometimes, that gel was stuck in bones or bits of wood that had already started to fossilize, so the silica trapped in there formed opals in the shape of those organic structures.

有时，这种凝胶留存在骨骼中或是少量已经开始变成化石的木材，所保留在那的二氧化硅构成了那些有机结构的欧泊。

Quartz is so varied that tons of gems — like amethyst, chalcedony, agate, and citrine — are all made of silica.

石英的种类太多，至于大量宝石——如紫水晶、玉髓、玛瑙和黄水晶皆由二氧化硅组成。

Whereas those with lower silica content, like intermediate to mafic volcanic andesite and basalt, tend to make darker iron and magnesium-rich flour, which absorbs more light, making lakes that look greener, grayish, or duller blue, depending on concentration.

而二氧化硅含量较低的岩石，比如中性到镁铁质的火山岩——安山岩和玄武岩，则会形成颜色更深、富含铁和镁的岩粉，这类岩粉吸收更多光线，从而使湖泊看起偏绿、偏灰，或是较为暗淡的蓝色，具体取决于岩粉的浓度。

Opal is formed when silica-rich groundwater hardens in rock over millions of years.

欧泊的形成过程是：富含二氧化硅的地下水在岩石经过几百万年硬化沉淀。

The pineapple silica differs from silica nanospheres that are synthesized in labs for various applications.

菠萝二氧化硅不同于在实验室合成的适用于不同用途的二氧化硅纳米球。

They're probably formed out of a silica rich solution.

它们可能是由富含二氧化硅的溶液形成的。

Silica and borosilicate, they are the most abundant minerals surrounding the water.”

水周围最丰富的物质就是二氧化硅和硼硅酸盐。”

The sample also contained silicon dioxide and silica glass.

样品还含有二氧化硅和二氧化硅玻璃。

And so we make some silicon dioxide.

因此我们制造了一些二氧化硅。

It's made from the stuff of microchips: silicon, a layer of silicon dioxide, and on top a very thin film of silicon nitride, which is perforated by a grid of microscopic circular holes.

硅、二氧化硅层及最上层非常薄的氮化硅薄膜，而这层薄膜被打上排成网格状的微小圆孔。

It's primarily silica, and silica is present in all the ecosystems on Earth — marine environments, most of the rocks — material of the kind that's already in the oceans.

它主要是二氧化硅，而二氧化硅存在于地球上的所有生态系统——海洋环境、大部分岩石——已经存在于海洋中的物质。

Silicone, to my understanding, is made out of a number of things, but notably silica, which is essentially sand, which is the same thing that glass is made out of.

据我所知，硅胶是由很多东西组成的，但最主要是二氧化硅，它本质上是沙子，玻璃也是由沙子组成的。

And we're talking about dumping millions of tons of silica over the Arctic that would sink to the bottom of the ocean when the ice melted.

而我们正在讨论的是向北极投放上百万吨二氧化硅，当冰层融化时，它们会下沉到海底。

More recently, silica (silicon dioxide, which comes from sand) has come to the forefront.

近年，硅土（从沙土中提取的二氧化硅）已经脱颖而出。

Grasses contain tiny pieces of silica, called phytoliths (illustrated above), whose job is to discourage herbivores, both vertebrate and insect.

草含有微量的二氧化硅成分，称之为植物岩（如上图所示），其职能是阻止脊椎动物和昆虫这样的食草生物。

These are spheres of silica, silica and oxygen.

这些是二氧化硅、二氧化硅和氧气的球体。

And so if silicon dioxide can make that, well what about something below that.

如果二氧化硅可做到这一点，那么低于这一水平的东西又如何呢？

It is called hollow glass microspheres, you can think of it as a kind of floating, very foot-friendly sand, so it's teeny, teeny spheres with a very thin silica glass shell around a gas core.

它叫中空玻璃微球，你可把它想象成一种漂浮的、非常容易踩踏的沙子，因此它是由非常薄的二氧化硅玻璃外壳围绕着气体核心制造的小球。

The fragment of silicon dioxide in the sample recorded the pressure and subsequent heat and depressurization of a lunar impact event.

样品中的二氧化硅碎片记录了月球撞击事件的压力及随后的热量和减压。

The mechanism of exactly how the silica helps catalyze the reaction is not clear yet--but it is very clearly does.

二氧化硅帮助催化反应的确切机理尚不清楚，但很明显确实如此。