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[audioFiles]2018m3x/audio_ezfj_ezflisteningd_201803_168[/audioFiles] Air Pol

游客2023-10-28  16
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答案     Air Pollution
    Air pollution consists of chemicals or particles in the air / that can harm the health of humans, animals, and plants. / Pollutants in the air take many forms. / They can be gases, solid particles, or liquid drops. /
    Pollution enters the Earth’s atmosphere in many different ways. / Most air pollution is created by people, taking the form of emissions from factories, cars, or planes. / Second-hand cigarette smoke is also considered air pollution. / These are all man-made sources of pollution. / Some types of air pollution, such as smoke from wildfires or ash from volcanoes, occur naturally. / They are called natural sources. /
    People experience a wide range of health effects from being exposed to air pollution. / Short-term effects, which are temporary, / include discomfort such as irritation to the nose, throat, eyes, or skin. / Long-term effects of air pollution, such as heart disease and lung cancer, / can last for years or for an entire lifetime. /
解析     空气污染
   空气污染包括空气中会损害人和动植物健康的化学物质和微粒。它们包括气体、固体颗粒或液滴。污染物通过多种方式进入大气层。大多数空气污染都是由人造成的，如工厂、汽车或飞机的排放物以及二手烟等进入空气。而某些类型的空气污染，例如野火烟或者火山灰，则是自然发生的，叫做自然污染源。
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