The sky over the city was overspread with a heavy smog.城市上空罩上了一层烟雾.Cars cause pollution, both smog and acid rain.汽车造成的污染既有烟雾也有酸雨。The river appeared as if enveloped in smog.那条河好像笼罩在烟雾之中。attempts to reduce smog caused by t...
Cars cause pollution, both smog and acid rain.汽车造成的污染既有烟雾也有酸雨。attempts to reduce smog caused by traffic fumes旨在降低车辆尾气造成的烟雾的措施The sky over the city was overspread with a heavy smog.城市上空罩上了一层烟雾....