1. We think of the deep lakes and oceans.
    想到深深的湖泊和海洋，

2. The water in these lakes can water farmland and provide water for cities.
    这些人工湖水能浇灌农田，并向城市供水。

3. They build large dams to store water in huge man-made lakes.
    为了把水储存在巨大的人工湖里，人们建造了巨大的水坝。

4. These rivers and lakes are contaminated.
    这些湖泊和河流已被污染。

5. However, in some places, the water of the lakes and rivers is no longer safe.
    但是有些地方的湖水和河水已不再安全。

6. And it is only in the seas and rivers, and sometimes lakes,
    所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，

7. Are there any creeks or lakes?
    那儿有没有小溪或湖呢?

8. Are there any creeks or lakes?
    那儿有没有小溪或湖呢?

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

10. It can flow into lakes too.
    或流进湖泊。