水处理用英文怎么说。。。

水处理:
1. water treatment
2. water curing
3. treatment of the water
4. aqueous processing.

Examples:
公共卫生方面的严重问题与该城低效率的污水处理系统有关。
The grave problem of public hygiene is connected with the inefficient sewage system of the city.

?
水处理什么意思