单词：coincidence beta-and-gamma rays
单词：coincidence beta-and-gamma rays 相关文章
Ali: Didn't you say your friend was American? Where is she going on her honeymoon? Shan: They're going skiing in Colorado. Ali: What a coincidence! These pajamas would be perfect to take along on the honeymoon! Shan: You're probably right. Oh, what t
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Gamma Ray Observatory to Open Soon in Mexico 墨西哥建造伽马射线天文台即将开放 American and Mexican scientists have completed construction of the world's largest gamma ray observatory, situated high in central Mexicos Sierra Negra Moun
VOA标准英语2015年(四月)
Dialogue 20 laurance--You look rather pal.Aren't you feeling well? soony--Not very.I was sick most of the might .I didn't sleep very well. laurance--What seems to be the matter?Is it the flu? soony--N
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But they never got there. The first disappeared into deep space. Another missed its target when its coordinates were confused. One NASA control center was working in metric, the other in feet and inch
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By David McAlary The U.S. space agency, NASA, launched a satellite Saturday that scientists hope will help them locate the sources of mysterious gamma ray explosions, the brightest most energetic burs
VOA2004（下）--健康科技
As summer approaches we all enjoy outdoor activities. But with sunlight becoming more intense we should protect our skin from harmful direct exposure to the sun. 随着夏日的到来，我们都喜欢进行一些户外运动。但因为日照愈加强
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