Factories must be prevented from pouring polluted water into rivers and lakes.
必须阻止工厂把被污染的水倒入河流和湖泊。
In order to make rivers and lakes clean and prevent water from being polluted, we must do something to stop all sorts of pollution.
为了保持河流湖泊清洁，防止水污染，我们必须采取措施，阻止各种污染。
The limited water resource has also been polluted badly. Kinds of sewage from some factories drained into the rivers without any effluent disposal.
有限的水资源也受到严重的污染。有的工厂的污水未作任何处理就排入河中。
The water we use comes from oceans, lakes, rivers or streams. But many of these water sources are getting seriously polluted. Towns and cities are pouring dust into the water.
我们用的水来自海洋、湖泊、河流或小溪，但这些水源有许多正受到严重的污染。
The water we use comes from oceans, lakes, rivers or streams. But many of these water sources are getting seriously polluted.
我们用的水来自海洋、湖泊、河流或小溪，但这些水源有许多正受到严重的污染。
What's more, a lot of rivers and lakes are beginning polluted by the waste water from factories. Fish can't live in them any longer.
而且，许多河流湖泊被工厂排放的污水所污染，鱼不能生存。
What's more, a lot of rivers and lakes are beginning polluted by the waste water from factories. Fish can't live in them any longer.
而且，许多河流湖泊被工厂排放的污水所污染，鱼不能生存。
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