Extraneous contaminant

The results of eutrophication analysis showed that internal pollution sources and external pollution sources were the main causes.

对富营养化成因进行分析,结果表明外源污染和内源释放是造成沙湖富营养化的主要原因,黄河补水和地表径流是主要的外污染源,最后根据分析结果提出沙湖富营养化的防治对策。

The study on the causes of eutrophication shows that internal pollution sources and external pollution sources are the main causes for the eutrophication .

对富营养化成因进行分析,结果表明内源污染和外源污染是造成洋河水库富营养化的主要原因,其中淀粉废水和地表径流是主要的外污染源。

Exotic pollution load analysis of south-west zone in Wuhan East Lake

武汉东湖西南区外源污染调查与评价

Research Advances in Toxicological Effects of External Pollutants on Earthworms

外源污染物对蚯蚓毒理作用研究进展

Pilot-scale Experimental Study on Constructed Wetlands for Eutrophication Lake Outer Pollution Control;

人工湿地净化富营养化湖泊外源污染试验研究

discharge prediction of industrial pollution sources

工业污染源排污预测

Studies on Mechanisms of External Phosphorus-Remediation of the Soil Contaminated with Cadmium (Cd) and Zinc (Zn);

外源磷对镉、锌复合污染土壤修复的机理研究

External Diseconomy of Agricultural Non-point Source Pollution and Its Internalization;

农业非点源污染的外部性及其内部化途径分析

Advances in non-point source pollution modelling with SWAT

SWAT模型在国内外非点源污染研究中的应用进展

Adsorption Behavior of Exogenous Thorium on Soil Contaminated by Rare Earth Industries

稀土工业污染土壤对外源钍的吸附行为研究

Evaluation for Suppression Effect with External Harmonics Sources

存在外界污染源时的谐波治理效果评估

Status Analysis of Agricultural Non-point Source Pollution and Advances in Domestic and Overseas

农业非点源污染现状分析及国内外研究进展

Study on Physical and Chemical Effects of Cadmium Pollution of Soil on Tomato Seedling Growth

土壤外源镉污染对番茄幼苗生长影响研究

The small individual sources of pollution are far more numerous than the large ones.

分散的小污染源远多于大污染源。

Any discharges by point sources, except in compliance with the limitations imposed in a permit, were declared unlawful.

特定污染源的任何排污，除了许可的之外，都被宣布为违法。

Pollution is a common form of external cost, a spillover effect of production which uses up other resources by degrading them.

污染是外在成本的共同形式，污染是商品耗费完这个资源又把这个资源退化，生成排放物的结果。

Heilongjiang Province Site Pollution Source Survey and Estimation

黑龙江省面污染源调查与污染物估算

A review with 15 references is given on the factors result in lead contamination in tea leaves based on the related researches of recent years.

根据近年来国内外对茶叶铅污染研究的相关报道，综述了茶叶中铅污染的主要来源。

marine pollution from land-based source

陆源造成的海洋污染

Protocol concerning Land-based Sources of Pollution

关于陆源污染的议定书