Last month, Delhi's 20 million people suffered through the worst smog episode in 17 years, according to the Centre for Science and Environment.
根据科学与环境中心的数据，上个月，德里市的2000万居民经历了17年来最严重的雾霾事件。
Last month, Delhi's 20 million people suffered through the worst smog episode in 17 years, according to the Centre for Science and Environment.
根据科学与环境中心的数据，上个月，德里市的2000万居民经历了17年来最严重的雾霾事件。
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