污染有许多种，比如噪声污染，空气污染和水污染。
There are many kinds of pollution, like sound pollution, air pollution and water pollution.
现代社会大城市污染越来越严重，比如空气污染，水污染和噪声污染。
Modern society has become increasingly serious pollution of big cities, such as air pollution, water pollution and noise pollution.
现代社会大城市污染越来越严重，比如空气污染，水污染和噪声污染。
Modern society has become increasingly serious pollution of big cities, such as air pollution, water pollution and noise pollution.
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