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TheairpollutionwassobadinHarbin,inChina,onOctober21,201...
问题详情:TheairpollutionwassobadinHarbin,inChina,onOctober21,2013thatthecityhadtocloseroadsandschools,andcancel hundredsofflightsfromitsairport.Newsreportssaidthesmog(amixtureofsmokeandfog)wassothickt...