单词：air craft carried normal earth fixed sys tem
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Without air, there would be no fire. There would be no cars or trucks, since motors need air in order to work. Without air, there would be no wind or clouds. There would be no weather, as we know it.(
自考英语（一）78讲
RACHEL MARTIN, HOST: Using a so-called air ambulance can be expensive, which is why such flights are usually only used by the critically ill. But a legal quirk means that paying for one of these flights can actually lead to financial ruin. Congress h
2018年NPR美国国家公共电台9月
Hawking, Zuckerberg to Search for Life in the Universe 霍金、扎克伯格寻找外星生命 It is one of the oldest questions ever asked: Are we alone or is there other life out in the Universe? Last week, an international team of scientists and b
2016年VOA慢速英语(四)月
When Augustus White was growing up in the American south in the 1940s, racial segregation was an accepted part of life. African Americans got second best - in education, employment, and health care. But White overcame those barriers, becoming an orth
VOA标准英语2011年(二月)
MARY LOUISE KELLY, HOST: All right, let's circle back to the U.S. and the aftermath of Hurricane Harvey. As if the record rainfall and flooding were not enough, many Houston-area residents are now coping with increased air pollution. Houston's petrol
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NASA has unveiled plans for its next-generation, post-Shuttle spacecraft to carry humans into earth orbit and beyond. The state-of-the-art, four-astronaut capsule, called the Multi-Purpose Crew Vehicle or MPCV, builds on earlier designs for the Orion
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