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化石木材里，所以保留在那里二氧化硅构了那些有机结构欧。

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

石英种类太多，以至于大量宝石——如紫、玉髓、玛瑙和皆由二氧化硅组。

Silica structure is based on a tetrahedral arrangement of a silica atom bonded to oxygen atoms.

它基本结构是由一个硅原子与四个氧原子键，构一个四面体。

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岩石，比如中性到镁铁质火山岩——安山岩和玄武岩，则会形颜色更深、富含铁和镁岩粉，这类岩粉吸收更多光线，从而使湖看起来偏绿、偏灰，或是较为暗淡蓝色，具体取决于岩粉浓度。

She caught him eating small round silica beads.

她发现他在吃小圆硅珠。

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适用于不同用途二氧化硅纳米球。

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

它们可能是由富含二氧化硅溶液形。

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

周围最丰富物质就是二氧化硅和硼硅酸盐。”

The diatomaceous silica in the litter could have clouded Dyson's senses.

猫砂里硅藻土可能影响了戴森嗅觉。

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。

" We think that lava planets could have exotic reflective atmospheres consisting of silica, which is the main component of rocks, and metals like sodium and potassium that could reflect starlight and make the planets appear very bright."

“我们认为熔岩行星可能有奇异反射大气层，它由硅——岩石主要分——以及钠和钾等金属组，这些金属能反射星光，让行星显得十分闪亮。”

Other risk factors for chronic bronchitis include exposure to air pollutants like sulfur and nitrogen dioxide, exposure to dust and silica, as well as genetic factors like having a family history of chronic bronchitis.

慢性支气管炎其他致病因素包括空气污染物，例如硫和二氧化氮、暴露于灰尘和硅土，当然还有遗传因素，例如有慢性支气管炎家族史。

Their competitor, Unimin, stopped construction last year to expand its Utica facility. But plant manager Nick Fetig says there is still demand for silica sand outside the fracking business.

该公司竞争者Unimin去年就暂停工厂扩展建设，但工厂经理尼克称，在石油开采行业之外行业仍对石英砂有需求。

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所有生态系统——海洋环境、大部分岩石——已经存在于海洋中物质。

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，但最主要是二氧化硅，它本质上是沙子，玻璃也是由沙子组。

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。

The plains of sand were followed by a bed of that viscous slime Americans call ooze, which is composed exclusively of seashells rich in limestone or silica.

接连细沙平原是一片胶粘泥地，单独由硅土或石灰贝壳构，美国人管它叫“乌兹”。

The solution? Novel blends of concrete that use cheap leftover materials from the coal and steel industries: fly ash, silica fume and slag.

有解决方法吗？使用粉煤灰、硅粉和矿渣等来自钢铁工业廉价剩余材料制造新混凝土。

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

草含有微量二氧化硅分，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食草生物。

Silica is better because it lowers hysteresis loss without reducing a tyre's grip.

硅土更佳原因在于它可以减少滞后损耗但又不会降低轮胎抓地力。