单词:radial filament
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WASHINGTON, Nov. 26 (Xinhua) -- U.S. President Barack Obama was hurt in a basketball game Friday morning, and got 12 stitches in his lip, the White House said. Obama got the stitches after his basketball game in the morning with personal aide Reggie
ANNOUNCER: Welcome to the VOA Special English program, People in America. Today, Sarah Long and Bob Doughty tell about the inventor Thomas Alva Edison. He had a major effect on the lives of people around the world. Thomas Edison is remembered most f
DAVID GREENE, HOST: This week, we have been exploring the realities of modern work. A new NPR/Marist poll found a lot of confidence in the future among American workers. A vast majority said they actually don't feel that threatened by the economic fo
Is it simply the byproduct of a crude mechanical action? 它仅仅是一个粗糙机械制作的副产品? Or is it an imitation of one half the set of sounds we make to express disappointment? 或者对我们抒发不满的一种声音的一半所进
Science and technology 科学技术 3D printing 三维压制 A third-world dimension 第三世界的发展空间 A new manufacturing technique could help poor countries as well as rich ones 一项新的制造技术能够对贫困国家有所帮助,就