单词：isentropic expansion refrigeration of gases
单词：isentropic expansion refrigeration of gases 相关文章
人口数量增长速度过快。给我们的生存环境带来哪些影响？ Alice: Hello, I'm Alice Finn: And I'm Finn. Alice: And this is 6 Minute English! This week were talking about population growth and the effects it might have on the world.
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Alice: Hello, I'm AliceFinn: And I'm Finn.Alice: And this is 6 Minute English! This week were talking about populationgrowth and the effects it might have on the world. At the moment itsestimated that there are about 7 billion people on the planet. F
六分钟英语
By Scott Stearns Washington 08 July 2006 President Bush says the U.S. economy is strong, and he wants Congress to keep it that way by boosting funding for research into new technologies. Opposition Democrats, meanwhile, say the president's plan to c
2006年VOA标准英语（七月）
a very interesting read about the rapid expansion of refrigeration in China: 关于中国制冷业的快速发展，有一个有趣的事实： It is not simply transforming how Chinese people grow, distribute and consume food. It also stands to beco
英语新闻
By Nina Maria Potts Brussels 05 April 2007 Watch Biofuels report The EU is emerging at the forefront of the fight against climate change. Pledging to cut greenhouse gas emissions by 2020 and boost renewable sources, EU politicians seem keener than e
2007年VOA标准英语（四月）
By Mil Arcega Washington, DC 06 April 2006 watch Global Warming report The state of California could become the first to impose emission caps on businesses to limit greenhouse gases. California Govern
2006年VOA标准英语（四月）