单词：meissner oscillator
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Keeping Time With Quartz Most people know that wrist watches commonly contain quartz. In fact, if you wear a watch, chances are its a quartz watch, since most watches is made today use quartz. But, you may not know what quartz has to do with keeping
英语听力文摘 English Digest
US Lawmakers Clash Over Fate of Children Crossing Border 美国立法者对于儿童穿越边境后的命运发生争执 CAPITOL HILL U.S. lawmakers are clashing over whether Congress needs to make changes to a law signed in 2008 to protect child vic
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ROBERT SIEGEL, HOST: A big policy question facing the country is what to do with the 11 million immigrants who are in the United States illegally - today the story of how that population grew so large. It's a long story. It's mostly about Mexico, and
2017年NPR美国国家公共电台3月
By Jim Stevenson Washington 18 January 2006 Women's figure skating has produced unpredictable finishes in recent years at the Winter Olympics. Tara Lipinski was the surprise winner at the 1998 Nagano
2006年VOA标准英语（一月）