水是一切有机体的主要组成部分,全球动植物和40亿人体内含有约11200亿吨水。人类社会依赖水而生存发展。古代,人类对水取利避害,适应水而生存;近代,人类对水兴利除害,兴建工程,开发水利,控制水害;现代,随着社会和生产的发展,地球上可资利用的水日趋短缺,水体受到污染,严重影响人类生存的环境,人类逐渐认识到水是一种重要资源和环境因素,从而在更高的水平上开始对水开展了新的兴利避害活动。
世界气象组织1996年初指出:缺水是全世界城市面临的首要问题,估计到2050年,世界2/3以上的人口将生活在城市,而全球有46%的城市人口缺水,必须平衡社会经济发展和城市淡水供应管理二者之间的关系,进行水资源的储存、输送和管理的大规模工程建设。
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My room is very simple but warm. My room’s color is white. At first, I think it is too drap, but now think it is comfortable for not too much color. There is a small bed, a desk, a bookshelf and a wardrobe in the room. It is very simple, right? But on the bed there are a lot of lovely dolls on my bed. There are teddy bear, Mickey Mouse, dolls and so on. I love the most is the bookshelf. On the shelf, there are different kinds of books. All of them are my favorite. Seeing the lovely dolls and wonderful books, I can have good dreams every night. I love my room.
我的房间简单而温馨。我房间的颜色是白色的。起初我觉得这太单调了,不过现在我觉得色彩没那么艳丽反而更舒服。我的房间里有一张小床,一张桌子,一个书架和一个衣橱。很简单,是吧?但是床上有很多可爱的玩具。有泰迪熊,米老鼠,洋娃娃等。我最喜欢的是书架。书架上有各种各样的书。它们都是我最喜欢的书。看着这些可爱的娃娃还有美妙的书,我每天晚上都能做美美的梦。我爱我的房间。
the importance of water(一
水的重要性(一)
the importance of water(一)
it is well-known that water is indispensable in existing, in producing and in living. and we should
not waste of a drop of water.
众所周知,在生产和生活中水是必不可少的。我们不应该浪费一滴水。
first, water is definitely important for life. as is known to us all, water is necessary to sup
port life. without water, human beings, animals and plants cannot exist at all.
首先,水对生命是非常重要的。众所周知,水是维持生命所必需的。没有水,人类,动物和植物都不复存在。 second, water is also significant for producing. for one thing, industrial production needs a lot of water, such as using water to generate electricity. for another, agricultural production is also in need of water, especially in irrigation.
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