acid rain
(Canada, military) Initialism of Canadian Armed Forces. / (Canada, military, aviation) Initialism of Canadian Air Force., predecessor of and successor to the Royal Canadian Air Force
The quality of being transitive.
Rain which is unusually acidic (pH of less than the natural range of 5 to 6); caused mainly by atmospheric pollution with sulphur dioxide, carbon dioxide and nitrogen compounds.
Having crystals less than nanoscale
酸性雨は市内の古い像を傷め、何十年にもわたって精巧な彫刻の細部を浸食しました。
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