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。
Since last weekend the weather has been heavy fog in north of our country, some experts concern that high concentration particles in the air might cause a variety of respiratory diseases, inclduing pulmonary infections and lung cancer.
