1. 污染物：进一步研究表明,采用化学分析方法如NMR等分析成分,认为CCDCA为CA,因此认为CA不是过敏原,采用法国和加拿大病人抗血清被动转移的P-K试验,对任何CA样品的可扩散者不产生反应,但是从绿原酸中分离而来的不扩散性的污染物(contaminant)对绿咖啡过敏者的P-K试验可产生过敏,

2. 污染物,杂质：containment facility 防范设施 | contaminant 污染物,杂质 | contamination 污染,沾污

3. 沾染物质：contactless scribing 无接触划片 | contaminant 沾染物质 | contaminant free film 无沾污膜

4. contaminant

4. 杂质：contaminant in fuel oil 燃料油中的污染物 | contaminant 杂质 | contaminated air 污染空气

1. 污染物
    A contaminant is something that contaminates a substance such as water or food.

    e.g. Contaminants found in poultry will also be found in their eggs...
           家禽身上发现的污染物，在禽蛋里也会有。
    e.g. We are exposed to an overwhelming number of chemical contaminants every day in our air, water and food.
           我们每天都会通过空气、水和食品接触到数量惊人的化学污染物。

1. a substance that contaminates

    Synonym: contamination