| 释义 |
acid rainˌacid ˈrain (also ˌacid precipiˈtation formal) noun [uncountable] THESAURUSsubstances that make air, water, soil, etc. dirty and harmful to humans and other living things► pollutionsubstances that make air, water, soil, etc. dirty and harmful to humans and other living things: Car exhaust emissions are a major source of pollution. ► smog dirty air in cities, caused especially by smoke from cars and trucks: The smog was so bad you couldn’t see the mountains from the city. ► greenhouse gases gases that surround the Earth and stop heat from escaping so that the air around the Earth gradually becomes warmer: The U.S. produces 25% of the world’s greenhouse gases. ► acid rain rain that has harmful acid in it, caused especially by smoke from cars and factories: Acid rain has killed the fish in the lake. ► contamination the fact of being dirty and unsafe to use, because harmful chemicals or other substances are there: Radioactive contamination was detected in the pipes.  earth science, geography rain that contains harmful substances such as nitric acid and sulfuric acid, which can damage the environment and is caused by smoke from factories, waste gases from cars and trucks, etc.
► see thesaurus at pollution |