英语语法分析

So we should try to improve the usage rate of water by saving water, control the overdevelop of underground water, make full use of ground water, fa-ther and reuse waste and polluted water.

因此，我们必须从节约用水、控制地下水超采和充分利用地表水及治理和回用废污水等多种途径提高水的利用率。