From the Middle East the Chinese acquired a blue pigment—a purified form of cobalt oxide unobtainable at that time in China—that contained only a low level of manganese.

中国人从中东获得了一种蓝色颜料，这是一种当时在中国很难得到的纯净的氧化钴，这种颜料只含有少量的锰。

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Pasta:Any of several starchy food pastes (pasta alimentaria) made from semolina, the purified middlings (endosperm) of a hard wheat called durum.

意大利面： 用粗粒小麦粉，即经过净化的硬质小麦的胚乳，制成的淀粉类食品。

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This paper reports the method of preparing purified human chorionic gonadotropin from pregnancy urine directly.

本文报道由孕妇尿中直接提取人绒毛膜促性腺激素精品的新方法。

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The piece pointed out that some of these products were improperly purified which meant that the health benefits from consuming Omegas each day were offset by the risk of ingesting a toxin.

FORBES: Content and Context Will Drive the Next Generation of Advertising

Indium is leached from slag and dust of zinc production and the metal further purified by electrolysis.

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The participating pupils enthusiastically found the pH of a sample of water from Intaka Island (a wetland in Cape Town) and thereafter filtered and purified the water.

UNESCO: World Water Assessment Programme (WWAP)