Society is changing rapidly. As a result, more and more people are suffering from stress. Those who are stressed out are often nervous, angry or ill. People must, therefore, learn to deal with this

发表于:2018-12-08 / 阅读(383) / 评论(0) 分类 赖世雄初级美国英语

This is Scientific Americans 60-Second Science. I am Cynthia Graber. This will just take a minute. Solar panels typically convert sunlight into electricity or heat. But photosynthetic vegetation converts sunlight into chemical energy. Now M.I.T.s Dan

发表于:2019-01-04 / 阅读(72) / 评论(0) 分类 Scientific American(八)月

AMERICAN MOSAIC - Jumping, Climbing and Running: Nothing Stands in the Way of Parkour Also: The Environmental Film Festival in Washington. And music by the British band the Chemical Brothers. Transcript of radio broadcast: 20 March 2008 HOST: Welcom

发表于:2019-01-11 / 阅读(40) / 评论(0) 分类 VOA慢速英语2008年(三)月

VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Steve Ember. This week, we will tell about an American study of the brain disorder schizophrenia. We tell about cars that use hydrogen as fuel. And,

发表于:2019-01-11 / 阅读(47) / 评论(0) 分类 VOA慢速英语2008(十)月

No one knew about his principle, because Avogadro himself was a retiring fellow, he worked alone, corresponded very little with fellow scientists, published few papers, and attended no meetings but also it was because there were no meetings to attend

发表于:2019-01-29 / 阅读(39) / 评论(0) 分类 万物简史

Syrian, American Doctors Skype in Chemical Weapons 'Situation Room' FORT WAYNE, INDIANA A group of Syrian-American doctors had anticipated a major chemical weapons attack in Syria and was planning for ways to help the victims. But they were unprepare

发表于:2019-02-01 / 阅读(29) / 评论(0) 分类 VOA常速英语2013年(九月)