acid rain

名词 acid rain:

1. rain containing acids that form in the atmosphere when industrial gas emissions (especially sulfur dioxide and nitrogen oxides) combine with water
   同义词：acid precipitation

1. Acid rain is harmful to amphibians such as salamanders, spring peepers, and frogs.
   酸雨是有害于两栖的动物，例如鲵、春天里唧唧叫的小动物和青蛙。