单词：fixed bed catalyst chamber
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(SOUNDBITE OF MUSIC) RACHEL MARTIN, HOST: It's time now for StoryCorps. And today we're going to hear from a woman who has spent her life in pursuit of her dream of reaching outer space. Seventy-eight-year-old Wally Funk is a pilot, flight instructor
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for when you shut the bellows, the valve cannot close the air-hole because of your finger, 因为, 当你关闭风箱把手时, 你的手指使得阀门无法关闭空气进出的圆孔, and most of the air then escapes through this hole instead of g
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By Deborah Tate Capitol Hill 14 March 2006 A U.S. Senate Democrat has introduced legislation to censure President Bush for authorizing the warrantless wiretapping of U.S. citizens. Russ Feingold (file
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This is Scientific Americans 60-Second Science, I am Cynthia Graber .This will just take a minute. How can we improve engines, inhalers and fire extinguishers? Maybe by copying a beetle. The bombardier beetle's name might scare off predators if they
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China's first global import expo, to be held later this year, is expected to offer unprecedented opportunities for Australian businesses to tap the Chinese market. A series of business forums have been held recently in major Australian cities to prom
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How Well Are You Performing in Your Different Roles? Each day, you play a number of different roles in both your professional and your personal life. Your professional world is a large part of what you do but if youre striving for excellence in this
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