acid rain Rain having a pH less than 5.6. The acidity results from chemical reactions occurring when water, sulphur dioxide, and nitrogen oxides, generally released by industrial processes, are chemically transformed into sulphuric and nitric acids

environ.

酸雨 (pH值小于5.6的雨。这种酸性来源于当工业生产方法中释放的水、二氧化硫和氮氧化物通过化学作用转换成硝酸和硫酸时所产生的化学反应。)

acid rain

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