As a result many rivers and lakes are polluted and there is less and less water for us to drink.
因此许多河流和湖泊被污染有越来越少的水给我们喝。
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。
Water is very important to the human beings. But now many rivers and lakes are polluted.
水是对人类非常重要。但是现在许多河流和湖泊受到污染。
Water is very important to the human beings. But now many rivers and lakes are polluted.
水是对人类非常重要。但是现在许多河流和湖泊受到污染。
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