水是人们赖以生存的物质。可是,有些人却把水看得微不足道。他们觉得水是一样再普通不过的东西了,浪费一点无所谓。这种想法是错误的。有一则广告是这么说的:人类的最后一滴水,也许就是他们自己的眼泪。每当我看见这则广告的时候,都特别有感触。我仿佛看到了龟裂的土地上,人们双手捧着碗,凝望苍天苦苦祈祷的画面。我想,他们应该是在说“:上 Water is the material upon which people depend. However, some people see the water as trivial. They think water is just as commonplace, it does not matter to waste a little. This idea is wrong. One ad said: The last drop of human beings, perhaps their own tears. Whenever I saw this ad, I was especially touched. I seem to see the cracked land, people holding their bowls, staring heaven painfully praying picture. I think they should be saying ”: on