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随时随地学习
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被污染的河流Pollutd Rivrs-污染的河流
最近，我们城市附近的河流被严重污染了。清洁的水不见了。以前，那里曾经有许多鱼儿自由地游来游去，可现在一条鱼也没有了，城市里许多工厂的废物倾倒入河流里。日复一日，那曾经漂亮的河流都已经变成了又臭又脏的垃圾堆。
Th rivrs nar our city hav bn sriously pollutd rcntly. Th clar watr has gon. Thr usd to b many fishs swimming frly in it. But now thy ar gon. Many factoris in th city pour th wast into th rivrs. And day aftr day, th onc bautiful rivrs hav turnd into smlly and dirty dustbins.
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