单词：heat puncture experiment
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Transcript This is Scientific American's 60-Second Science. I'm Cynthia Graber . This will just take a minute. Some peppers have a mild, fresh flavor. But others burn your lips and leave a lingering, numbing kick. If you enjoy that tingling thrill, y
Scientific American(八)月
Lessons of Failure Lord, are you trying to tell me something? For... Failure doesn't mean I'm a failure; It does mean I have not yet succeeded. Failure doesn't mean I've accomplished nothing; It does mean I've learned something. Failure doesn't mean
英语美文
Lessons of Failure Lord, are you trying to tell me something? For... Failure doesn't mean I'm a failure; It does mean I have not yet succeeded. Failure doesn't mean I've accomplished nothing; It does mean I've learned something. Failure doesn't mean
白领英语晨读
One of the better early attempts at dating the planet came from the ever-reliable Edmond Halley, who in 1715 suggested that if you divided the total amount of salt in the world's seas by the amount added each year, you would get the number of years t
万物简史
EDUCATION REPORT - Duke iPod Experiment By Nancy Steinbach Broadcast: Thursday, August 05, 2004 This is Steve Ember with the VOA Special English Education Report. Duke University in Durham, North Caro
教育与新闻
At one time it was believed that heat was a liquid. Sure, that sounds kind of crazy, but if you think for a second, you might see why. Suppose you have an object thats very hot say a metal spoon thats been sitting in hot coffee. Pick it up and you ca
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