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[audioFiles]2014m8s/audio_ezfj_333_20144[/audioFiles]

游客2024-09-30  55
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答案                             Water Pollution
    Water is very important to us. / Factories and plants need water for industrial uses and large pieces of farmland need it for irrigation. / Without water to drink, people die in a short time. /
    Today most water sources are so dirty that people must purify water before drinking. / Water becomes dirty in many ways: / industrial pollution is one of them. / With the development of industry, plants and factories pour tons of industrial wastes into rivers every day. / The rivers have become seriously polluted, / and the water is becoming unfit for drinking or irrigation. / The same thing has also happened to our seas and oceans. / So, the problem of water pollution is almost worldwide. /
    Scientists of many countries have done a lot of work to stop pollution. / The polluted water in some places has become clean and drinkable again. / Perhaps one day the people in all towns and cities will be drinking clean water. / That day, we believe, is not very far off. /
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