water use ratio

例句：

1. 1. The city's water use ratio is a concern for environmentalists.
   这个城市的水使用比例是环保人士关注的问题。
2. 2.To reduce water use, the company has implemented stricter water usage ratios.
   为了减少用水，公司实施了更严格的用水比例规定。
3. 3. The government has set a target to increase the water use ratio by 20% within the next five years.
   政府设定了一个目标，在未来五年内将水使用比例提高20%。