单词：fresh water ecosystem
单词：fresh water ecosystem 相关文章
44.Obtaining Fresh water from icebergs The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being con
新概念优美背诵短文50篇
By Caty Weaver Broadcast: August 1, 2003 This is Steve Ember with the VOA Special English Environment Report. Last month a judge ordered the United States Army Corps of Engineers to begin to lower wat
VOA2003（下）-环境与健康
Water Cycle 水循环 All the oceans on earth are salty, while inland water is typically fresh. How does water become salty? We'll answer a listener's question -- today on Earth and Sky. DB: This is Earth and Sky. We recently visited the Austin Childr
(科普英语)Earth and Sky
Broadcast: February 21, 2003 By George Grow This is the VOA Special English Environment Report. Everywhere, water use is increasing. Humans already use fifty-four percent of all the fresh water in riv
VOA2003（上）-社会广角
Aral, Caspian Seas Remain Under Ecological Threat 咸海与里海仍旧处在恶劣的生态环境威胁之下 The Soviet Union was home to two of the world's largest inland bodies of water, the Aral
VOA2005（上）--环境科学探索
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is
新东方背诵文选
The Secret Life of Roots Plant roots are important to life on earth. Roots take in water and nutrients that the plant needs to live and grow. They also help secure plants in dirt to prevent erosion - the breakdown of soil by natural forces. Roots are
2015年VOA慢速英语(九)月
Water is the source of life, a key factor in development and the essence of a harmonious ecosystem. With China's water environment deteriorating, and growing competition for water resources causing more disputes, both authorities and NGOs are realizi
世界各地新闻集锦
The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being considered quite seriously by many nations,
考研背诵50篇
We are here in the wilderness in the Rocky Mountains, observing nature's impressive architects and engineers: beavers. By creating this pond they are preventing soil from being washed away and they are creating a place where new plants and insects ca
国家地理2007年
Scientists Help Insects to Help Colorado River Fish Fish need insects for food. So, healthy rivers have healthy insect populations. However, in the United States, part of the Colorado River has an insect shortage that has left many fish without food.
2018年VOA慢速英语(五)月
Broadcast: Apr 04, 2003 The war in Iraq is taking place around the Tigris and 2) Euphrates Rivers, what 3) archaeologists call the cradle of Western civilization. The historic rivers flow into the Mes
VOA2003（上）-科技先知
Chris: Hello and welcome to 6 Minute English from BBC Learning English, the programme where we discuss a topical subject and introduce you to some of the interesting vocabulary connected to that topic. I'm Chris and with me today is Rosie. Rosie: Hel
六分钟英语
President Bush says when the troops leave Iraq, it will be from a position of strength. The president made a surprise visit to Iraq this morning. He says some troops could go home if security in the Anbar province gets better. The 10-year-old girl wh
美联社新闻一分钟2007
Severe Drought, Wildfires Threaten Water Resources This is Valles Caldera. Actually, it's the giant mouth of a dormant super volcano that last erupted 40,000 years ago. In the millennia since then, the terrain developed high-elevation forests, of abu
VOA标准英语2012年(一月)
As efforts to try to cap the oil well that has poured millions of gallons of crude into the Gulf of Mexico faltered Saturday, we took a tour of the vast ecosystem along Louisiana coast for a first hand look at what is at stake. The Louisiana coastlin
VOA标准英语2010年(五)月
By Stefan Bos Budapest 15 April 2008 The European Union and several key Danube organizations are urging countries along the river Danube to prevent irreversible damage to the waterway, warning the growing pollution could endanger drinking water for s
VOA常速英语2008年（四月）
Eliminate fireplace odor There's nothing cozier on a cold winter night than a warm fire burning in the fireplace -- unless the fire happens to smell horrible. Next time you have a fire that sends a stench into the room, try throwing a few lemon peels
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The Minister for the Environment, Dr Nick Smith, said today that the government will spend money on controlling our fresh water and will make some important laws. New Zealand is number 3 in the world for the amount of water per person. We have many r
新西兰英语