China's sichuan basin by acid rain forest area of the harm of forestland one-third of the total.

中国的四川盆地受酸雨危害的森林面积达占林地总面积的三分之一。

youdao

China's sichuan basin by acid rain forest area of the harm of forestland one-third of the total.

中国的四川盆地受酸雨危害的森林面积达占林地总面积的三分之一。

youdao