Water is the most valuable resource on the earth. Water is the necessity of our life and we must drink it everyday.Now, many people can not drink clear water, because many of them are badly polluted. So, in order to save water, the first thing we should do is reduce water pollution. In addition, we should develop good habits to save water. For example, turn off the tap after we use. Or we should recycle the water to make it full use. In one word, water is scarce for all of us and we should try our best to save it.

翻譯：

水是地球上最寶貴的資源。水是生活的必需品，我們每天都需要喝水。現在，很多人都喝不到干凈的水，因為很多水都被嚴重污染了。因此，為了節約用水，我們首先要做的就是減少水污染。另外，我們應該養成節約用水的好習慣。比如，用完水的時候關掉水龍頭。或者我們應該循環用水以達到充分利用。總之，水是對我們大家都是稀缺的，我們應該盡最大努力保護它。