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The descendants of longtime urban dwellers show increased genetically driven resistance to tuberculosis, due to evolutionary selection pressure over millennia. Christopher Intagliata reports 城市长久居住民的后代，经过数千年的自然选择
60秒科学
迷你对话： A:What did her boss say to you? 老板对你说什么了？ B:He asked me tobeef upin the work. 他让我在工作中提起精神。 A:Yeah. You look so unhappy recently. Whats the matter. 是啊。最近看起来你不大高兴。有什
迷你对话学地道口语
图片1 increase n. 增加，增大，增长vt. 增加，加大vi. 增加，繁殖 例句：There was a steady increase in population after the war. 战争之后，人口在不断增长中。 boost v. 推进 例句：Edward is not very cheerful; he n
漫画搞定六级词汇（文本+音频）
Understanding of English Improves Worldwide 全世界范围内英语理解能力增强 The worlds understanding of English appears to be getting better. The private education company EF recently released a report called English Proficiency Index. The
2014年VOA慢速英语(十二)月
US Report: Al-Qaida Affiliates Pose Growing Threat 美国报告称基地组织分支的威胁增强 WASHINGTON The United States says a growing number of al-Qaida affiliates and other terrorist groups in the Middle East and Africa pose a serious thre
VOA标准英语2014年(五月)
JEFFREY BROWN: Some perspective on these early reports and what it says about the economic health of the American consumer. We turn to Jerry Storch. He has his own advisory firm. He's a veteran of the retail industry, including as former chief execut
PBS访谈商业系列
Key Lawmakers to Obama: Enhanced Strategy for Syria Needed 奥巴马：叙利亚重要的国会议员需要增强策略 WHITE HOUSE As the White House continues to make the case to U.S. lawmakers that Congress should approve military action against S
VOA常速英语2013年(九月)