impurities的音标：impurities的英式发音音标为：[ɪm'pjʊərɪtɪs]impurities的美式发音音标为：[ɪm'pjʊərɪtɪs]...

Once its impurities had settled, the oil could be graded.一旦杂质沉淀下去，油就可以分级了。A filter will remove most impurities found in water.过滤器会滤掉水中的大部分杂质。Oil is refined to remove naturally occurring impurities.油经过提炼去除天然存在的杂质。...

n.不纯( impurity的名词复数 )，不洁，淫秽，杂质...

Once its impurities had settled, the oil could be graded...一旦杂质沉淀下去，油就可以分级了。The separation and determination of the primary impurities of diflubenzuron by liquid chromatography were carried out.通过反相液相色谱方法往甲醇与水的混合流动相中加入适当...