Daylight Turns Thin Plastic Barrier into Germ-Killing Material Daylight-powered germ-killing equipment may someday help protect health workers from deadly microorganisms like Ebola virus disease. That is a finding from a study published in the journa

发表于:2019-01-03 / 阅读(38) / 评论(0) 分类 2018年VOA慢速英语(四)月

By Paul Thompson Broadcast: September 10, 2003 (THEME) VOICE ONE: This is Phoebe Zimmermann. VOICE TWO: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Seven astronauts and

发表于:2019-01-11 / 阅读(74) / 评论(0) 分类 VOA2003(下)-美国人文故事

This is the VOA Special English Development Report. Today we bring you a new take on an old tale. It's the story of the three little pigs and the big bad wolf that blew down a house made of straw and one made of sticks. The only house left standing

发表于:2019-01-11 / 阅读(45) / 评论(0) 分类 VOA慢速英语2009年(十)月

Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre

发表于:2019-01-14 / 阅读(63) / 评论(0) 分类 VOA标准英语2014年(二月)

Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h

发表于:2019-01-14 / 阅读(58) / 评论(0) 分类 VOA标准英语2014年(七月)

AGRICULTURE REPORT - September 3, 2002: Mulch By George Grow This is Bill White with the VOA Special English AGRICULTURE REPORT. Mulching is one of the best things people can do for their plants. Mulc

发表于:2019-01-30 / 阅读(80) / 评论(0) 分类 农业与发展