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TED演讲:男性避孕药会如何起效(3)
Men make a thousand sperm every second and to have an effective contraceptive, 每秒中,男性可生产出一千个精子,所以有效的避孕药 you need to get that level of sperm production down to one percent of its normal value. 必须把这个精子生
President Bush and Her Majesty Queen Elizabeth II Exchange T
May 8, 2007 8:00 P.M. EDT HER MAJESTY QUEEN ELIZABETH II: Mr. President, I wondered whether I should start this toast saying, "When I was here in 1776" -- (laughter and applause.) Mr. Presid
经典名人英语演讲稿55:中国的未来之路(“金融天才”乔治·索罗,斯布达佩斯中欧大学演讲)
55. The Way Ahead of China 55. 中国的未来之路 Why should China submit to a new multilateral system in view of the fact that it is set to emerge as the winner from the current turmoil? The answer is equally s
美国总统每周电台发言(2008-10-18)
President's Radio Address THE PRESIDENT: Good morning. Our Nation is dealing with a serious financial crisis. Over the past month, Americans have witnessed fast-moving events involving complicated fin