由於我國北方自上周末以來一直持續大霧天氣，有專家擔憂，空氣中含有的濃度較高的顆粒物很可能會導致包括肺部感染以及肺癌在內的多種呼吸道疾病。
Because there has been dense fog since last weekend in the north of the country, some experts worry that the highly concentrated particles in the air may cause lung infection and many other respiratory diseases including lung cancer.
