The forested land improve penetration of soil and reduce ground runoff flow;

林地可改善土壤的渗透性，减少地表径流流量；

In China the density of forest has fallen since 1949 in many parts of the country but the area of its forested land has steadily risen.

自从1949年以来，中国的许多地方森林的密度在下降，但森林的面积在稳定上升。