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Black holes got their name because light can't escape them, beyond a certain radiusthe event horizon. But in 1974 Stephen Hawking proposed that quantum effects at the event horizon might cause black holes to benot completely black. Hawking said that
2016年Scientific American(八)月
Mom's Flu Vaccination Boosts Baby Birth Weight Pregnant women who get vaccinated against influenza are less likely to have low birth weight babies, according to a study conducted in Bangladesh. In this study, 340 pregnant women were randomly assigned
VOA标准英语2012年(二月)
The Art of Fiction: A Guide for Writers and Readers is a nonfiction book by Ayn Rand,published posthumously. Edited by Tore Boeckmann, it was published by Plume in 2000. The book is based on a 1958 series of 12 four-hour lectures about fiction which
实用英语
The Art of Doing Nothing Sure, we all know how to do nothing. We all know how to lay around and waste time. But many of us are too busy to do it much, and when we do it, our minds are often on other things. We cannot relax and enjoy the nothingness.
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The Art of Cry When Mrs Johnson entered Belli's room, she found that he was binding up his thumb. What's the matter with you? she asked. It is because of that hammer. Belli answered. But I didn't hear you cry. Oh, I thought you were not in just now.
趣味英语
The art of living is to know when to hold fast and when to let go. For life is a paradox: it enjoins us to cling to its many gifts even while it ordains their eventual relinquishment. The rabbis of old put it this way: A man comes to this world with
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