单词:carbon dioxide semiauto-welder
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CHAPTER TWO Reading POLLUTUO FIGHTERS [00:09.90]Judy is collecting some facts for a class project on pollution. [00:18.44]She is interviewing Doctor Ray,a scientist,about trees. [00:27.51]Judy:Why are you so interested in trees,Doctor Ray? [00:38.16]
Unit 8 [00:02.90]Save Your World!What Is Garbage?Garbage is everything that you throw away. [00:13.06]What do we do with garbage?We bury or burn most garbage. [00:19.54]Burying garbage is quick and easy but uses a lot of land. [00:26.07]Most land nea
By Greg Flakus Scientists in Texas are trying to find a way of reducing carbon dioxide air pollution by capturing the gas, compressing it and then putting it underground. This technique could also yie
10 布什总统将就全球变暖问题与欧盟领导进行会谈 Bush to Discuss Environmental Concerns Jessica Berman Washington 10 Jun 2001 02:11 UTC The White House says President Bush takes glob
AGRICULTURE REPORT – March 12, 2002: Carbon Dioxide and Crops By George Grow This is the VOA Special English AGRICULTURE REPORT. Increasing levels of carbon dioxide gas in Earth’s atmosphere have
Drivers in the eastern United States may soon start paying for the pollution made by their motor vehicles. Nine eastern states and Washington, D.C. are launching a system of pricing the carbon dioxide produced from burning gasoline and diesel fuel. M