| 21. | the pollution of our beaches with oil |
| 石油对我们海滩的污染
|
| 22. | rivers defiled by pollution |
| 受污染的河流
|
| 23. | free of weeds, contamination, pollution , etc |
| 无杂草, 传染, 污染等
|
| 24. | anxiety concerning the pollution of the atmosphere |
| 对于大气层污染的忧虑
|
| 25. | prevent the pollution of the environment |
| 防止环境污染
|
| 26. | make progress in solving the problem of air pollution |
| 在解决空气污染问题上取得进展
|
| 27. | carry on nationwide investigations of air pollution |
| 进行全国性的空气污染调查
|
| 28. | hold a special session on problems of air pollution |
| 举行空气污染问题特别会议
|
| 29. | raise hell about pollution |
| 为污染问题大兴问罪之师
|