Water diversion from other area is an effective method to ensure the safety of water supply in Shanghai city.

从其他地区引入优质水，已成为保障上海市供水安全的重要途径。

youdao

Analying the potable water pollutant pathway in supply water, the paper introduces the effective method of pollution control of supply water in the design of domestic architecture.

分析生活饮用水在给水过程中受污染的途径，介绍住宅建筑给水设计中污染控制的有效方法。

youdao

Facing the problem of water crisis in China, it is necessary to take effective measure of balance of water supply and demand, and find a solution, which is the key to solve water problems in China.

面对我国水资源危机的现实问题，进行有效的水资源平衡分析，找出平衡缺口是解决我国水问题的关键。

youdao

International agreements, new technologies and improved efficiency are all necessary to preserve the world's water supply, but effective water conservation and protection could require more profound changes.

CNN: flooded field

It is spread through infected faeces and, once it enters the water supply, it is difficult to stop - especially in a country like Haiti which has almost no effective sewage disposal systems.

BBC: UN launches appeal to fight Haiti cholera epidemic