单词：high-strength steel electrode
单词：high-strength steel electrode 相关文章
This is Scientific American's sixty seconds science, I'm Christopher Intagliata. Got a minute? Instead of installing solar paint on your roof how about just giving a house new paint job of cause you'd have to sure to use solar paint. That's what to a
Scientific American(十二)月
This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan
Scientific American(八)月
Population Reflects Economic Woes in One US Town The city of Gary, Indiana, was founded in 1906 by the head of the United States Steel Corporation, Elbert H. Gary. U.S. Steel continues to operate a massive plant along the shores of Lake Michigan, tho
VOA标准英语2011年(八月)
Obama Touts US Manufacturing Gains 奥巴马吹捧美国制造业就业增长 BALTIMORE From lowering unemployment to boosting manufacturing, President Barack Obama is expected to tout gains in the U.S. economy during his State of the Union address o
VOA标准英语2015年(一月)
从马林钢丝公司看美国制造业的发展 When Drew Greenblatt bought Marlin Steel Wire Products in 1998, the workers were paid minimum wage and bent steel by hand to form wire baskets to hold bread. 1998年德鲁格林布拉特买下马林钢丝
VOA标准英语2015年(三月)
STEVE INSKEEP, HOST: There is a big divide between older Americans who are ready for retirement and those who don't quite have the money. Our colleague Marilyn Geewax retired from her post as an NPR business editor, and then she attended her 45th hig
2018年NPR美国国家公共电台9月