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

• 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。
• This gaseous impurity is able to bring about metal corrosion and contaminating.
  这些气相杂质的存在会造成金属材料腐蚀，并污染环境。
• 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 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；
• 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。
• Used for screening the thick impurity wasted paper pulp.
  用于对废纸浆进行粗大杂质筛选。
• Alunite is a harmful impurity which is difficult to remove from kaolinite, and so is kaolinite in alunite ore.
  明矾石是高岭土中难以除去的有害杂质，高岭石也是明矾石矿石中的有害杂质。
• Vitriolic impurity is contained normally in the sewage that vitriolic factory discharges.
  硫酸厂排放的污水中通常含有硫酸杂质。
• 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 impurity profile is normally dependent upon the production process and origin of the API.
  杂质概况一般与原料药的生产工艺和起源有关。