音标：['pɒlɪsækærɪdi:z] ；

多糖

n any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules

Summer Plans

Lesson 5 Text A Summer Plans Peter and Mary are talking about their plans for the summer. Mary is going to work in the city, but Peter is going to go to camp. Mary thinks that their friend John is goi

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VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Barbara Klein. Visitors to Washington, D.C., in the summer often want to stay inside air-conditioned museums. The cooler days of fall are a good time t

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VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. Im Bob Doughty. VOICE TWO: And Im Faith Lapidus. Summertime in the United States always means many outdoor activities. They include outdoor fairs, carnivals, theater and lots of music. Man

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By Peter Heinlein New York 20 July 2006 UN Secretary General Kofi Annan, center, speaks at a security council meeting at UN headquarters, New York, July 20, 2006 U.N. Secretary-General Kofi Annan has called for an immediate end to fighting between I

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NATO foreign ministers meet Tuesday and Wednesday in Brussels to discuss the candidacies of Georgia and Ukraine to join the Atlantic alliance. From Paris, Lisa Bryant reports the European ministers may also hold talks on sending an interim force to

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学英语单词

alternate bearing

anaxagoras

arteria genus inferior lateralis

arthraxon lancifolius

asymptotic behavior of incoherent Mary system

back reflection x-ray examination