water is very precious in our life. we can't live without water. We can use water to do many different things. for example we use water to cook, to put out fires and so on.but there is less and less water on the earth. so we must save water. we shouldn't leave rubbish in the water and keep the water clean. and we can reuse water. let's protect water.
我们必须节约用水，不能浪费水资源
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