1. Sometimes water from factories goes into streams and rivers.
    有时从工厂里排放出来的水流进了小溪和河流，

2. Many people enjoy catching fish in the rivers.
    许多人喜欢在河里钓鱼。

3. Rivers, land, and forests are so contaminated that many are now biologically dead.
    河流、土地及森林的污染是如此严重，以至现在其中的许多在生物学上来讲已经死亡。

4. Lakes and rivers add beauty to the world.
    江河湖泊让世界变得更美。

5. In mediaeval times rivers were the veins of the body politic as well as economic.
    在中世纪，河流不仅是经济的命脉, 而且是国家的命脉。

6. It might run off into streams, rivers and oceans.
    也许会流入小溪、河流和海洋里去。