您要查找的是不是：
- For one thing they keep the water clean. 一方面，他们可以保持水的清洁。
- Noxious chemicals are found in the river water. 河水里发现了有毒化学物品。
- The river water is very clear; you can see your face in it. 河水很清，你都能从里面看清自己的脸。
- river water cleaning 河水净化
- Dredging the river aims at keeping the river course smooth and water clean. 清挖河道是为了保持河道畅通，河水清洁。
- River water has broken the bank of a river. 河水冲破了河岸。
- How can we make waste water clean? 我们怎样才能使废水净化呢?
- They did nothing to make the waste water clean. 他们没有采取措施净化废水。
- River water is used in fighting fires. 用河水灭火。
- We must keep sea water clean and stop polluting it. 我们必须保持海水干净,停止污染。
- The river water is still rising. 河水的水位仍在上涨。
- I only see the river water flowing into the sea. 但见长江送流水。
- River water is fresh, but sea water is salt. 河水是淡的，但海水是咸的。
- River water is harnessed to produce electricity. 利用河水发电。
- The smell of river water permeated the air. 空气中河水的味道弥漫。
- Pumps are now gaining on the river water. 水泵在吞噬着河水。
- The river water has whelmed the banks. 河水已溢出了堤岸.
- Use clean water to remove dirt, and keep the water clean. 用干净的水去掉杂质，同时要保持水的干净。
- Canals carry the river water to the fields when necessary. 必要时，水渠可以把河水输到田里。
- This filter moves dirt suspended in the water and keeps the water clean. 这个滤水器能去除水中残留的脏东西，保持水的干净。
