水很珍贵。我们必须节约用水，不要轻率浪费。
Water is precious. It is important that we conserve water and don't waste it carelessly.
首先，我们必须节约用水。其次是我们必须寻找循环用水的有效方法。
Firstly, we should all learn how to save water. Secondly, we should find out the way to reuse it.
如果我们不希望这种事情发生我们必须要节约用水从我们可以开始做小事情。
If we don 't want this kind of thing to happen we must save water from we can begin with doing small things.
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。
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，我们必须对水的再生、再利用，淡化水和节约用水做出决定，以获得更多的用水。
So, among all of us, we must decide to regenerate, reutilize, desalinate and save to have more water.
总之，我们必须采取行动节约用水，防止水受到污染。
In a word, we must take action to save water and prevent water from being polluted.
总之，我们必须采取行动节约用水，防止水受到污染。
In a word, we must take action to save water and prevent water from being polluted.
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