The presence of
impurities can affect the melting point of a substance.
杂质的存在会影响物质的熔点。
The chemist carefully purified the sample to remove any
impurities.
化学家仔细地纯化了样本以去除任何杂质。
The water supply was contaminated with
impurities from industrial waste.
水源被工业废物中的杂质污染了。
The purity of gold is measured in karats, with 24-karat being free from
impurities.
金的纯度用克拉来衡量，24克拉的金是无杂质的。
Impurities in the fuel can cause engine damage over time.
燃料中的杂质会随着时间的推移导致发动机损坏。
The scientist is studying the effect of
impurities on the conductivity of semiconductors.
这位科学家正在研究杂质对半导体导电性的影响。
The process of distillation helps to separate pure substances from their
impurities.
蒸馏过程有助于将纯净物质与其杂质分离。
The presence of
impurities in the raw materials led to inconsistent product quality.
原材料中含有杂质导致产品质量不一致。
The diamond's value decreases with an increase in
impurities or inclusions.
钻石的价值会随着杂质或内含物的增加而降低。
The filtration system removes
impurities from the air in the factory.
过滤系统能去除工厂空气中的杂质。
"For instance, the Simandou iron ore project (in Guinea), which involves Chinese companies and Rio Tinto, produces 65.5 percent grade iron ore, and has relatively low alumina and silica impurity levels, helping boost the steel industry's efforts to reduce carbon emissions," Zhu said.
朱说：“例如，中国公司和力拓集团参与的西芒杜铁矿石项目（几内亚）生产了65.5%的铁矿石，氧化铝和二氧化硅杂质水平相对较低，有助于推动钢铁行业减少碳排放。”。
Gao explained that in China, about 85 percent of lithium resources exist in salt lakes that have lower concentrations of lithium, but instead are rich with boron, magnesium and other impurities, thus making lithium extraction much more difficult.
高解释说，在中国，大约85%的锂资源存在于锂浓度较低的盐湖中，但却富含硼、镁和其他杂质，因此锂的提取更加困难。
According to Dai Zhongqiu, a senior executive at China Crystal, traditional calcinators contain a high proportion of iron and impurities, therefore the quality of the compound mica they produce is relatively low, and it usually costs a lot for the post processing of compound mica.
Current calcining experiments showed that the produced compound mica flakes have no impurities, contain good flexibility and are in thin sheets, which can significantly lower the post processing cost.
Low-cost, high-yield phosphorus-mining technology, which helps extract 95 percent of the mineral from phosphate ore, after removing impurities, is an example of how Wengfu has prioritized high-quality development.
Vale supplies the best quality iron ore in the world with the lowest impurities.
The coal-to-hydrogen project uses coal as the raw material, adopts the large-scale pressure swing adsorption, which is a technology to separate impurities from hydrogen streams, to generate hydrogen from the fossil fuels.
More importantly, the product obtained through the traditional method still contains a significant amount of unfavorable impurities that may largely deteriorate the performance and limit the application of the product.
更重要的是，通过传统方法得到的产品中仍含有大量不利杂质，这些杂质可能大幅降低产品性能并限制其应用。
To solve this long-standing issue, the new production line will adopt a novel electrochemical technology which may mitigate the reliance on external energy supplies, secure zero pollution and lower the level of the unfavorable impurities at the same time.
为解决这一长期存在的问题，新生产线将采用一种创新的电化学技术，有望减少对外部能源供应的依赖，确保零污染，并同时降低不利杂质的含量。
To ensure quality of commodities in this category, the national standards contain strict regulations regarding impurities, moisture and quality of metals, together with specific classification inspection methods to better distinguish solid waste and normal raw materials, said Cui Yan, deputy secretary-general of the Beijing-based China National Resources Recycling Association.
中国国家资源回收协会会长副会长崔岩表示：“为确保此类商品的质量，国家标准包含了关于杂质、水分以及金属质量的严格规定，并且制定了具体的分类检验方法，以便更好地区分固体废物和正常原材料。”
未经许可，严禁转发。QQ交流群：688169419