单词：repository system
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美国911博物馆 Eleven years after the September 11 terror attacks leveled the World Trade Center, work on a museum at the site, which was to open on the anniversary this year, has stopped - because of financial and power disputes. At the same tim
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. The Earths crust is old. Billions of years old. So old that its nearly impossible to imagine. And now scientists have discovered what may be the oldest
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One day Mel Martin stopped by the chambers of a judge with whom he had lunch appointment. As his friend changed from robe jacket, Martin noticed a shiny black pistol bolstered to the judge's shoulder.
英汉幽默故事选读
One day Mel Martin stopped by the chambers of a judge with whom he had lunch appointment. As his friend changed from robe jacket, Martin noticed a shiny black pistol bolstered to the judge's shoulder. The judge was not a firearms enthusiast, so Marti
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