AS IT IS 2016-07-28 Vietnam: Serious Lessons Learned From Fish Kills 越南:从鱼死亡中吸取教训 Vietnams Prime Minister says his country has learned serious lessons from mass fish kills in four coastal provinces. Large numbers of dead fish

发表于:2018-12-08 / 阅读(41) / 评论(0) 分类 2016年VOA慢速英语(七)月

Candidates Differ on Handling China's Rise At the first televised presidential debate between John F. Kennedy and Richard Nixon in 1960, the issue was U.S. support for Taiwan, then called Formosa. I believe strongly in the defense of Formosa, Kennedy

发表于:2018-12-08 / 阅读(32) / 评论(0) 分类 VOA标准英语2012年(十月)

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Conditions such as mad cow disease are caused by abnormally shaped proteins, called prions. Prions spread by causing other, normal proteins to misfold

发表于:2018-12-24 / 阅读(36) / 评论(0) 分类 Scientific American(九)月

This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Its like the molecular version of the Joker and the Riddler teaming up against Batman. Scientists at Yale University have discovered that amyloid beta, a

发表于:2019-01-08 / 阅读(62) / 评论(0) 分类 Scientific American(三)月

RACHEL MARTIN, HOST: Scientists have developed a better test for a very rare brain disease. And as NPR's Rae Ellen Bichell reports, this test could lead to new ways to diagnose more common diseases like Parkinson's and Alzheimer's. RAE ELLEN BICHELL,

发表于:2019-01-16 / 阅读(42) / 评论(0) 分类 2017年NPR美国国家公共电台2月

AGRICULTURE REPORT - Biological Controls, Part 1 By Mario Ritter Broadcast: Tuesday, April 13, 2004 This is Steve Ember with the VOA Special English Agriculture Report. Biological controls are living

发表于:2019-01-30 / 阅读(52) / 评论(0) 分类 农业与发展