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groundwater pollution
space	地下水污染
groundwater pollution Contamination of any water found under the earth's surface by any leaching pollutants, such as inorganic compounds (chlorides, nitrates, heavy metals, etc.), synthetic organic chemicals (pesticides, fertilizers, etc.) and pathogens (bacteria, parasites, etc.)
environ.	地下水污染 (地表下任何水体受到污染物，如无机化合物(氯化物、硝酸盐、重金属等)、合成有机化学物质(农药、肥料等)及病原体(细菌、寄生虫等)等渗漏的污染。)

groundwater pollution: 38 phrases in 4 subjects

Earth sciences	1
Hydroelectric power stations	1
Technology	33
Water resources	3