saving：n. 节约；挽救；存款 adj. 节约的；挽救的；补偿的；保留的 prep. 考虑到；除...之外
例句：The resource of water has been wasted seriously, while the potential of saving water is very considerable.
句意：水资源被严重浪费，运用价格手段节约用水是最有效的办法。