In the carbonizing process, the wool cloth is treated with dilute sulfuric acid, dried, and then heated until the impurities are converted to carbon.
在碳化过程中,毛织物由稀硫酸处理、烘干,然后升温直至不纯物质全部碳化。
making impure or corrupt by adding extraneous materials.
加入其它外来物质使之不纯或腐坏的。
The star indicates a property of a pure substance or a collection of pure substances.
星号表示纯物质或纯物质集合的性质。
a simple substance, mixture
单纯的物质、 混合物
Pure metals are chemical elements whick cannot be broken down into other substances.
纯金属是不能分解成其他物质的化学元素。
I believe, however, we can get at least some pure materials before the end of this year.
不过，年终以前我们起码可以得到少量纯物质。
The measurement uncertainty of the purity of the three CRMs is ±0 2%.
三种农药标准物质纯度定值的不确定度为±0?2％ 。
Study on Material Transfer of Different Processes of Compound Hawthorn Depuration Solution
复方山楂提纯液不同工艺的物质转移研究
An element is a simple substance that cannot be broken up into anything simpler.
元素是一种单质，它不可能再分成任何更单纯的物质。
The gasolene, kerosene, and the gas oil fractions are purified to remove unwanted materials, mainly sulphur compounds.
汽油，煤油，和气体油馏分被提纯以去除不想要的物质，主要是硫化物。
It is not easy to separate a mixture of liquids into pure substances by fractional distillation.
通过分级蒸馏把液体中的混合物分解成纯物质是不容易的。
It is not always easy to separate a mixture of liquids into pure substances by fractional distillation.
用馏分蒸馏法把液体的混合物分成纯物质，不总是轻而易举的事。
Something that renders something else impure; an inferior component or additive.
混杂物；粗劣品一些使得别的物质不纯净的物质；劣等的成分或附加物
F-gold is not mixed with any other metal.
纯金是不搀杂质的。
Recently, it has been shown that such substances, either by themselves or by virtue of their impurities or reaction products, are teratogens.
最近已经证明，这类物质，或是它们本身，或是它们的不纯物或反应产物，都是致畸形物。
But if the field changes or oscillates quickly enough, it produces a gravitational attraction, just like ordinary or dark matter.
不过，要是纯量场变化或是振盪得够快，它就会产生重力相吸效应，一如普通物质或是暗物质。
any substance that adulterates (lessens the purity or effectiveness of a substance).
任何掺入物质（降低一种物质的纯度或效力）。
guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium
含水介质生物降解能力的连续测定用不纯水可溶有机化合物的处理和制备导则