1. economize on water; save on water

　　節約用水

　　2. Conservation of water is of great importance.

　　節約用水非常重要。

　　3. We must economize on water.

　　我們必須節約用水。

　　4. The government is appealing to everyone to save water.

　　政府號召大家節約用水。

　　5. Please economize the water, thanks for cooperation!

　　6. Saving water is to cherish life.

　　節約用水就是珍惜生命。

　　7. The power enterprises shall economize on water.

　　電力企業應當節約用水。

　　8. Everyone has the accountability to save water and to propagate the concept of treasuring water.