Can you see a curved fish? 你看到过畸形鱼吗？

　　Curved fish live in dirty water. 畸形鱼生活在污水中。

　　Curved fish started to appear because of water pollution. 它们的出现是因为水污染。

　　How does water pollution happen? 水污染是怎么造成的呢？

　　People and big factories throw away dirty water into rivers and lakes, so the rivers and lakes become polluted. 人们和大型工厂往河流湖泊中倒污水，所以它们就被污染了。

　　Water pollution is very harmful to plants and a lot of living things. 水污染对植物和许多生物都非常有害。

　　People should be very careful not to pollute water. 人们应该注意不要污染水资源。