由于我国北方自上周末以来一直持续大雾天气，有专家担忧，空气中含有的浓度较高的颗粒物很可能会导致包括肺部感染以及肺癌在内的多种呼吸道疾病。
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.
