Recently, cooking fume is one of the most important air pollution sources in many cities.
近年来，饮食业油烟污染已成为城市大气污染的主要来源之一。
One of the sources of air and water pollution is the modern coatings.
现代涂料为空气与水的污染源之一。
The release airborne effleunts from coal energy chain have become main sources of air pollution.
煤燃料链已成为我国环境污染的主要来源。
The release airborne effleunts from coal energy chain have become main sources of air pollution.
煤燃料链已成为我国环境污染的主要来源。
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