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。
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.
