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

发表于:2018-12-07 / 阅读(101) / 评论(0) 分类 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

发表于:2018-12-26 / 阅读(70) / 评论(0) 分类 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

发表于:2018-12-30 / 阅读(67) / 评论(0) 分类 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

发表于:2019-01-12 / 阅读(122) / 评论(0) 分类 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

发表于:2019-01-14 / 阅读(77) / 评论(0) 分类 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

发表于:2019-01-27 / 阅读(52) / 评论(0) 分类 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

发表于:2019-02-01 / 阅读(61) / 评论(0) 分类 VOA常速英语2013年(九月)