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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什么是家的味道?在我住校前,我从来没有想过这个问题。但是,如今在我已经住校一个月后我知道什么是家的味道了。我想念我妈妈做的美味食物了,还有她喋喋不休的.唠叨声。爸爸坐在客厅中间看电视。两个弟弟的打闹声还有冰箱里的冰淇淋都让我觉得很温暖。所有这些都使得一个房子成为一个家。这些就是我心目中家的味道。
Transportation during the Spring Festival, called chunyun in Chinese, is an annual test on Chinas transportation systems.
The Spring Festival, also known as the Chinese Lunar New Year, which falls in late January or early February according to Gregorian calendar, is the most important festival for the Chinese as it is an occasion for reunions with family and friends.Particularly, people hope to return home from work or study to have a reunion dinner with families on the Lunar New Years Eve.Hundreds of millions of Chinese people are on journey as the Spring Festival travel season begins. Therefore, Chunyun has created enormous pressure on Chinas transportation sector.
The Ministry of Railway and the National Development and Reform Commission usually issue circulars during the period, demanding that coordination mechanisms be established among transportation departments, different localities and police, and that countermeasures be made in place in case of emergencies to ensure efficiency and a complete success during the peak travel season.
中国人将“春节期间的运输”简称为“春运”,它是对中国交通运输系统的年度考验。
春节,即中国农历新年,通常始于公历一月末或二月初,它是中国人最重要的节日,是家人及亲朋好友团聚的日子。人们尤其希望在学习和工作之后赶回家中与家人一起吃年夜饭。春运期间,数以亿计的中国人都在旅途奔波,因此,它给中国的交通部门造成了巨大的压力。
中国铁道部和国家发改委在此期间会下发各类通知,要求运输部门、地方各级部门、警察部门建立协调机制,制定各种措施应对紧急情况的.发生,确保运输效率,保证高峰季节的运输得以顺利完成。
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