您要查找的是不是：
- Smokers pollute the air. 吸烟污染空气
- Bicycling doesn't pollute the air. 骑脚踏车不污染环境。
- Cars pollute the air in the form of waste gas. 汽车以废气的形式污染空气。
- It is clean and does not pollute the air. 它很干净,不污染空气。
- These factories pollute the air in a large scale. 这些工厂造成了很大范围的空气污染。
- Bicycling is a good exercise; moreover, it doesn't pollute the air. 骑脚踏车是很好的运动;而且还不污染环境。
- Exhausts from the factory ususally pollute the air. 从工厂排出来的废气经常污染空气。
- The exhaust gas from factory often pollute the air. 从工厂排出来的废气经常污染空气。
- Emissions from factories pollute the air. 工厂排放物污染空气。
- By the factory pollutes the air seriously. 这个工厂排出的烟严重污染了空气。
- The government levies a fine against the factories for polluting the air with smoke. 政府向以烟尘污染空气的工厂征收罚金。
- I feel I ought to say (that) they do not pollute the air. 我觉得我应该说明，它们并不污染空气。
- They not only pollute the air in cities, but make them crowded. 汽车不仅污染城市空气，而且使城市拥挤不堪。
- I feel I ought to say(that) they do not pollute the air. 我觉得我应该说明，它们并不污染空气。
- They not only pollute the air in cities,but make them crowded. 汽车不仅污染城市空气，而且使城市拥挤不堪。
- I feel I ought to say(that) they don't pollute the air. 我觉得我应该说明，它们并不污染空气。
- I feel I ought to say( that) they don't pollute the air. 我觉得我应该说明，它们并不污染空气。
- I feel i ought to say ( that ) they do not pollute the air . 我觉得我应该说明，它们并不污染空气。
- Bicycling is good exercise; moreover, it doesn't pollute the air. 骑自行车是一种很好的运动，此外，还不污染空气。
- They not only pollute the air in cities, but make them crowed. 汽车不仅污染城市空气，而且使城市拥挤不堪。
