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。

youdao

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。

youdao