To investigate the influence of river pollution on environment, especially formation of acid rain.
探讨河网严重污染后对环境的影响，尤其是对酸雨形成的影响。
Air pollution the air pollution question is also the acid rain question.
空气污染空气污染问题也是酸雨问题。
Air pollution the air pollution question is also the acid rain question.
空气污染空气污染问题也是酸雨问题。
应用推荐