By Paul Sisco Washington, D.C. 24 November 2006 watch Polar Melting report 2007 is International Polar Year. It's an international effort to spur scientific research at the most forbidding places on Earth, primarily because many in science consider

发表于:2019-01-12 / 阅读(111) / 评论(0) 分类 2006年VOA标准英语(十一月)

BBC Learning English Weekender Poles in the media Callum:Hello, I'm Callum Robertson and this is Weekender. One of the largest groups of new migrants to Britain are Poles. In 2004 Poland entered the European Union which gave Polish people much great

发表于:2019-01-16 / 阅读(129) / 评论(0) 分类 Weekender

ARI SHAPIRO, HOST: There are cyclones at the poles of Jupiter. That's one of the surprises that NASA is reporting today. The space agency's Juno probe has been orbiting the gas giant since last summer. It's completed six revolutions of the planet so

发表于:2019-01-17 / 阅读(39) / 评论(0) 分类 2017年NPR美国国家公共电台5月

图片1 图片2 图片3

发表于:2019-02-09 / 阅读(83) / 评论(0) 分类 加州英语分级G5

图片1 图片2 图片3 图片4 图片5

发表于:2019-02-09 / 阅读(86) / 评论(0) 分类 加州英语分级G5

图片1 图片2

发表于:2019-02-09 / 阅读(114) / 评论(0) 分类 加州英语分级G5