单词：bandwidth allocation control protocol
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Welcome to Words and Their Stories, from VOA Learning English. On this program we explore common expressions in American English. Like all languages, our expressions come from everywhere. They come from nature, sports, and food. They come from money,
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Half Duplex Half duplex is a transmission path capable of transmitting signals in both directions, but only in one direction at a time. HDLC high-level data link control Header The header is control i
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This is Scientific Americans 60-Second Science, I'm Cynthia Graber. This will just take a minute. In vitro fertilization(试管受精) efforts can be helped by oddly enough oral contraceptives .That's the finding from Tel Aviv University, site of the
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This is Day to Day from NPR news, I am Medlin Bran. Have you ever wondered just who runs the Internet? Well a non-profit organization here in the US is responsible for technical oversight, but lately there's been some loud protests from other countri
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by Andrew Horowitz. Today on Money Girl I will be discussing the importance of asset allocation and how it alone can shape your financial future. Do you want to start investing but dont know where to start? Are you already investing but think that yo
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After four years of negotiations, representatives of 135 nations have unanimously agreed on the text of a protocol to end the illicit trade in tobacco products. Nations are expected to adopt the protocol, the first under the WHO Framework Convention
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