英语语法分析

But it should reinforce the point that, on hydrological grounds alone, conserving forest is often essential.

不过仍然应该强调这一点：就算只为了保存水份，保护森林仍然是必要的。

The latter established the Commission for Hydrological Meteorology, which by 1971 had evolved into the present CHy.

后者设立了水文气象学委员会，到1971年演变为今天的水文学委员会。

The theme addresses the role of forests and trees outside forests to help moderate soil, hydrological and aquatic systems.

本主题处理森林及森林外树木帮助调节土壤、水文以及水生系统的作用。