发表于:2018-11-28 / 阅读(388) / 评论(0) 分类 疯狂英语2003年

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? Robin Williams thought that the platypus was cobbled together by an inebriated deity: Lets take a beaver. Lets put on a ducks bill. Now we know how weird the platypus is

发表于:2019-01-08 / 阅读(52) / 评论(0) 分类 Scientific American(五)月

By Nico Colombant Dakar 26 March 2008 Liberia's much-heralded and awaited census is plodding ahead amid problems with workers who want more money and Liberians who are not staying home to be counted. VOA's Nico Colombant has more from our regional bu

发表于:2019-01-12 / 阅读(50) / 评论(0) 分类 VOA标准英语2008年(三月)

Zinc supplements reduce the average cold by about a day and also make symptoms(症状) less severe, according to the latest findings. There's no cure for the common cold, but there's no shortage of ways to treat the symptoms. For a number of year

发表于:2019-02-05 / 阅读(44) / 评论(0) 分类 英语新闻

LONDON, June 16 (Xinhua) -- Drillings and fillings at the dentist's are always dreadful and make tooth decay treatment very unpleasant. But British scientists have developed a new approach of fixing tooth decay, which could get rid of all the drillin

发表于:2019-02-18 / 阅读(56) / 评论(0) 分类 英语新闻

Sodium? 钠吗? Yes, sir. Mixed with mercury, it forms an amalgam that takes the place of zinc in Bunsen cells. 是的,先生。钠跟汞混合,成为一种合金,代替本生电池中所需要的锌。 The mercury is never depleted. Only the

发表于:2019-02-25 / 阅读(122) / 评论(0) 分类 《海底两万里》中英双语有声读物