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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. There's a huge, gunky brown cloud that lingers over south Asia and the Indian Ocean each winter. Its been known to cause respiratory diseases and even

发表于:2018-12-24 / 阅读(59) / 评论(0) 分类 Scientific American(一)月

[00:02.60]第19单元 自由战士 [00:05.20]Lesson 73 1 Dialogue [00:08.53]第73课 1.对话 [00:11.86]The year is 1963 in the USA.Two men are talking in prison. [00:15.88]美国.1963年.两个男人在狱中交谈. [00:19.91]A:Why are you in here?

发表于:2019-01-10 / 阅读(108) / 评论(0) 分类 高中英语人教版高二

By Lisa Bryant Paris 05 February 2007 More than half of blacks living in France say they face racial discrimination, according to the first-ever survey on the country's black population. The findings are troubling for a country that has long prided i

发表于:2019-01-11 / 阅读(72) / 评论(0) 分类 2007年VOA标准英语(二月)

Study: Reducing Soot is Fastest Way to Slow Climate Change A new study finds that reducing carbon-rich soot emissions could be the fastest and most economical way to slow climate change and protect human health. Those dust-like particles released in

发表于:2019-01-13 / 阅读(41) / 评论(0) 分类 VOA标准英语2011年(九月)

By Cindy Saine Washington 16 November 2007 An independent survey on racial attitudes in the United States shows a growing number of African Americans say they are worse off now than they were five years ago, and that they don't expect their lives to

发表于:2019-02-05 / 阅读(101) / 评论(0) 分类 VOA常速英语2007年(十一月)

Anirudh Sharma doesn't just want to pull harmful carbon from the air. He wants to offer a cheaper alternative to the exorbitant costs of ordinary printer ink. 阿尼鲁德夏尔马不仅想除掉空气中的有害炭物质,还希望创造一种更便

发表于:2019-02-13 / 阅读(55) / 评论(0) 分类 阅读空间