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很多公共场所都有“节约用水”的标志,我感到很奇怪:水在地球中不断地循环,并没有“流”到地球外面去,那为什么还要“节约用水”呢?我并不是说不要节约,只是比较好奇而已。——浙江宁海蒋旭怡
I find it strange that many public places have signs of “saving water.” Water repeats itself in the earth without “flowing” to the outside of the earth, so why save water? I'm not saying that you do not want to save, just curious. Zhejiang Ninghai Jiang Xuyi