不再适合饮用或灌溉
Not suitable for drinking or irrigation
为了阻止水污染
In order to prevent water pollution
许多国家的科学家做了大量的工作
Scientists in many countries have done a lot of work也许有一天所有的人都能喝上干净的水
Maybe one day all people can drink clean water
希望那一天不会太远
Hope that day will not too far away
以上为机器翻译结果,长、整句建