background impurity

英 [ˈbækɡraʊnd ɪmˈpjʊərəti]

美 [ˈbækɡraʊnd ɪmˈpjʊrəti]

本底杂质

According to the geological background and characteristics of the ore area, the paper distinguish that ore body exist in impurity carbonate rock.
文章介绍了矿区地质背景、矿床地质特征，矿石、围岩的稀土配分曲线呈富轻稀土的右倾型，曲线形态基本一致。
This paper researched the market background and united the requirement of an important big project of Shanghai agriculture government, which is the research of X-ray food impurity detective equipment.
本文主要针对上述市场背景，结合上海市农委重大攻关项目X-RAY食品异物检测设备的研制的要求，对相应的关键技术进行了研究，并研发出了具有我国自主知识产权的X-ray无损检测设备。
The background of the subject derives from the industrial on-site monitoring of the image acquisition system, such as linear CCD camera system widely used in removal of tobacco impurity, cotton testing, food cleaning, fabric testing, rice color sorter and so on.
本课题背景源于工业现场监测的图像采集系统，如广泛应用于烟草除杂，棉花检测，食品除杂，布匹检测，大米色选等领域的线阵CCD相机系统。