The geologist does well to regard granite as a compound of quartz, felspar, and mica.

地质学家认为花岗岩是石英，长石和云母的混合物非常好。

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Thiomersal does not contain methyl mercury, which is a naturally-occurring compound and whose toxic effects on humans have been well studied.

硫柳汞不含有甲基汞，后者是一种自然产生的化合物，其对人类的有毒影响已得到充分的研究。

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"There is a compound in traditional Chinese herbs that can stimulate fracture repair," o 'keefe says. "it alters a signaling pathway well known to regulate bone formation."

“中草药中有一种化合物可以刺激骨折处修复，”OKeefe说，“它能开启一条修复骨骼信息的信号通路”。

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Well, I need to write the reaction that forms that compound from it's elements, right?

我需要写出从元素单质生成,这种化合物的反应，对吧？

麻省理工公开课 - 热力学与动力学课程节选

Before dawn on Feb. 16, a semitrailer truck left a secret, well-protected compound outside Sarasota, Fla.

FORBES: New College of Florida

They might take out officially declared sites, but intelligence agencies know that there are others too, like the weapons-sized uranium-enrichment plant being built secretly in a mountainside on a well-guarded compound near Qom whose existence was revealed only four months ago.

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Garrido kidnapped Dugard in 1991 in South Lake Tahoe, California, fathered two daughters with her and held her captive in a well-hidden backyard compound, authorities said.

CNN: Authorities study bone found near accused kidnapper's home