| 1. | Soot fouls the air .
烟屑污染空气。 |
| 2. | Each of the preceding classifications of polluted air masses involves primarily particulate pollutants .
上述每类被污染空气基本都含有粒状污染物。 |
| 3. | Cars pollute the air in the form of waste gas
汽车以废气的形式污染空气。 |
| 4. | Avoid crowded area , and maintain good ventilation at home
避免污染空气，及保持家居空气流通。 |
| 5. | Avoid crowded area , and maintain good ventilation at home
避免污染空气，及保持家居空气流通。 |
| 6. | They also cannot pollute the air with clouds of smoke and dirt
它们也不能用成团的烟尘污染空气。 |
| 7. | Do you avoid putting pollutants in the air by never burning your leaves
你从不烧树叶以免污染空气吗 |
| 8. | Study on the acaroid mites breeding in stored traditional chinese medicinal materials
粉螨污染空气的研究 |
| 9. | 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。 |
| 10. | Air diffusion council , usa
污染空气排放委员会 |
