1·Nitrogen isotope compositions of groundwater reflect characteristics of contamination sources in the environment of well-drained soils and oxygenated ground waters.
在土壤排水良好、氧化的地下水环境中，地下水的氮同位素组成反映了源的特征。
2·One of the main measures of improving IAQ is to control contamination sources strictly Electrostatic air cleaners are a type of purifying equipment widely used to remove indoor air contaminants.
改善室内空气品质的主要措施之一就是控制室内空气中的污染物，静电室内空气净化器便是一种常用的去除室内空气污染物的净化设备。
3·"Unfortunately, the federal law and the available federal funding don't get at identifying and reducing sources or contamination," said Toni Glymph.
“不幸的是，联邦法律和可用的联邦资金并没有用于识别和减少污染源或污染。”托尼·格里夫说。
4·The project succeeded in screening 346 sites with potential chemical contamination risks and identifying 58 priority pollution sources for follow-up mitigation actions.
通过对346个具有潜在化学污染风险的点进行筛查，这一全球环境基金项目识别出58个重点污染源作为采取后续措施的重点。
5·Sources of this include the medical use of radioactive materials, fallout and contamination from nuclear industry, and the storage and dumping of radioactive waste.
辐射源包括医用放射性材料、核工业的放射性沉降物和污染物，以及辐射废弃物的积存和倾倒。
6·The modern sediment is an important storehouse of the nutrient salt and pollutant in lakes. Under proper conditions, these internal contamination load sources can cause the eutrophication of lakes.
现代沉积物是湖泊营养盐和污染物的重要储藏库，在一定条件下，这些内源污染负荷可能成为水体富营养化的主导因子。
7·It can be greatly reduce consumption of energy and raw materials, and decrease contamination in terms of their sources, if we execute cleaner production project in rubber ingredients industry.
橡胶助剂行业污染大、能耗高，在该行业推行清洁生产可大大降低物耗和能耗，从源头消减污染。
8·In this paper, the natures, sources and characteristics of radioactive contamination are presented and particularly all kinds of radioactive contamination affecting the human lives are introduced.
介绍了放射性污染性质、来源和特点，重点介绍了各种影响人类生活的放射性污染。