单词：fresh-water ecosystem
单词：fresh-water ecosystem 相关文章
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 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
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
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