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1·A filter will remove most impurities found in water.

过滤器会滤掉水中的大部分杂质。《牛津词典》

2·Oil is refined to remove naturally occurring impurities.

油经过提炼去除天然生成的杂质。《柯林斯英汉双解大词典》

3·The air in the factory is filtered to remove impurities.

工厂里的空气经过过滤去除杂质。《柯林斯英汉双解大词典》

4·Impurities were burnt away with the use of coke, producing a high-quality refined iron.

杂质用焦炭烧掉，产生高质量的炼铁。

5·Some people have attributed this longevity to their consumption of a natural mineral water, which is remarkably free from impurities.

一些人认为这些人长寿应归功于他们饮用的一种明显不含杂质的天然矿泉水。

6·This pulp rubbed gently on the face and the skin polishes the area, clearing it of all impurities that cause pimples, black heads and spots.

轻轻擦在脸上和皮肤的这种纸浆会使这些区域变得光亮，清除所有导致丘疹、黑头和斑点的杂质。

7·The inventor Henry Bessemer discovered that directing a blast of air at melted iron in a furnace would burn out the impurities that made the iron brittle.

发明家亨利·贝塞默发现，在熔炉里对铁水直接吹一吹气，就会烧掉使铁变脆的杂质。

8·Once its impurities had settled, the oil could be graded.

一旦杂质沉淀下去，油就可以定级了。《柯林斯英汉双解大词典》

9·The results showed that he solubility of xylitolincreased with adding impurities such as sorbitol or adonitol.

结果表明，木糖醇的溶解度随加入山梨糖醇或山梨糖醇等杂质而增加。

10·XRD patterns showed that the cathode material is well-crystallized, homogeneous olivine-type phase, with only tiny trivalence iron impurities.

XRD 图谱表明，阴极材料结晶完整，为均一橄榄石型结构，仅含少量三价铁杂质。

(1)mechanical impurity机械杂质

(1)impurity element杂质元素