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20-Kilometer Inflatable Tower Could Make Space Launches Cheaper 加拿大设计20公里长可充气通天塔使太空发射成本更低 Launching space vehicles is still very costly because booster rockets are not reusable. A space elevator could mak
VOA标准英语2015年(九月)
A: What else can I do for you today? 今天我还能为您做些什么呢？ B: Well, I've been browsing online，but I'm not really sure what to do about payment. I would like to know what the most convenient way to do it is. 嗯，我一直在网上浏
银行英语情景口语
A: Personal Finance Department, Lucie speaking, how may I help? 这里是个人理财部，我是Lucie，我能如何为您效劳？ B: Hello there. I need some advice about personal finance. Could you help me please? 你好。我需要咨询一下个人
银行英语情景口语
1. Five of the seven terror suspects arrested yesterday have made their initial court appearance in Miami. They're accused of plotting to bomb the Sears Tower in Chicago and other buildings. Security
美联社新闻一分钟2006
AS IT IS 2016-10-05 Coming Soon to the Office: Facebook at Work Facebook recently estimated that each of its users spends an average of 50 minutes a day on the companys online social network. But the company wants to find ways to increase the time sp
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ROBERT SIEGEL, HOST: President-elect Donald Trump says his family will not move into the White House as soon as he's inaugurated. His wife and young son will remain in New York City. For the Secret Service, that means setting up shop in one of the mo
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