impurity

英 [ɪmˈpjʊərəti]

美 [ɪmˈpjʊrəti]

n.  杂质; 肮脏; 不纯; 淫秽

复数：impurities　

CET6TOEFL化学

BNC.15794 / COCA.17928

牛津词典

noun

• 杂质
  a substance that is present in small amounts in another substance, making it dirty or of poor quality
  1. A filter will remove most impurities found in water.
     过滤器会滤掉水中的大部分杂质。
• 肮脏；不纯；淫秽
  the state of being dirty or not pure

柯林斯词典

• N-COUNT 杂质;不纯物质
  Impuritiesare substances that are present in small quantities in another substance and make it dirty or of an unacceptable quality.
  1. The air in the factory is filtered to remove impurities.
     工厂里的空气要经过过滤，以清除其中的杂质。
• 淫乱;不贞
  Impurityis the state of being no longer pure, especially sexually pure.

英英释义

noun

• the condition of being impure
  Synonym:impureness
• worthless or dangerous material that should be removed
  1. there were impurities in the water
  Synonym:dross

双语例句

• The impurity elements on the surface of the silicon sample corroded were analyzed by an energy dispersive spectroscope.
  用能谱仪对腐蚀后的硅表层杂质元素进行分析；
• If they occur, the Pharmacopeial and NDA impurity limits and rationale should be reviewed;
  如果发生变化，应检查药典和NDA杂质限定和原理；
• A new many-valley effective mass impurity state theory is presented.
  本文提出了一种新的多能谷有效质量杂质电子态理论。
• Study on the Determination of Trace Composition and Impurity Elements in Kaolin with ICP-MS
  ICP-MS法测定高岭土中微量成分及杂质元素的研究
• The size-dependent effect of energy and binding energy of hydrogen-like donor impurity quantum ring are calculated with B-spline technique.
  利用B样条技术计算类氢施主杂质量子环能级和束缚能的量子尺寸效应。
• There is an impurity in your product.
  你的产品中有杂质。
• Lead as impurity in RIG ( rare earth iron garnet) Faraday rotators used for fibre optic communications systems.
  于光纤通讯系统稀土铁石榴石法拉第旋转器中作为杂质的铅。
• Some impurity as well as bromine was brought by solid matter that smuggled with foam fog in flash steam.
  闪蒸气中雾沫夹带的固体物引入了溴等杂质。
• The oxidizing roast of high impurity ferromolybdenum was studied by using rotary kiln.
  采用回转窑加热的方法对高杂质钼铁（合金）氧化焙烧进行了研究。
• The physical properties of wheat grain bulk with different impurity types and contents were analyzed.
  对含有不同杂质类型和含量的小麦粮堆物理特性指标进行了测定。