常见例句双语例句He said that without intervention, PM2.5, a major cause of choking smog, would replace smoking tobacco as the top risk factor for lung cancer.他表示,如果不采取任何措施的话,造成令人窒息的浓雾的主要因素之一——PM2.5将会取代吸烟,成为诱发肺癌的首要因素。 返回 choking factor