汽车排出的废气使我们城市中的空气遭受污染.Exhaust fumes from cars are poisoning the air of our cities.土壤被从工厂排出的化学废料污染了.The soil has been poisoned with chemical waste from the factory.汽车 、 卡车和公共汽车排出的废气和工厂的废气差不多同样有害.Cars, trucks and buses prod...