Northern China is braced for more days of hazardous air quality following a week of toxic smog in Beijing that has consistently averaged more than 16 times the World Health Organisation’s recommended upper limit.
中國北方在今后幾天將繼續(xù)面對(duì)有害的空氣質(zhì)量。此前，有毒霧霾持續(xù)籠罩北京已有一周，污染物含量平均為世界衛(wèi)生組織(WHO)建議上限的逾16倍。
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