发表于:2018-11-27 / 阅读(170) / 评论(0) 分类 英语口语1+1

Broadcast: February 14, 2003 By George Grow This is the VOA Special English Environment Report. President Bush has offered a plan to speed development of technology that uses hydrogen as fuel. His goa

发表于:2018-12-07 / 阅读(75) / 评论(0) 分类 VOA2003(上)-科技导航

Narrator: Exercise 3.9. Lecture 3: Electric cars? Solar-powered buses? When most people imagine solutions to the problems of city air pollution they probably think of electricity and solar power. But the problem with an electric car is that the elect

发表于:2018-12-30 / 阅读(82) / 评论(0) 分类 202 Useful Exercises for IELTS

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. When we think about how to represent sound visually, most of us probably picture those volume-dependent sine waves. But thats not how John Stuart Reid

发表于:2019-01-08 / 阅读(59) / 评论(0) 分类 Scientific American(一)月

The U.N. Secretary-General says between $25 billion and $40 billion is needed each year to boost agricultural production and assist farmers worldwide, in order to curb the growing global food crisis. From United Nation's headquarters in New York, VO

发表于:2019-01-13 / 阅读(47) / 评论(0) 分类 VOA标准英语2008年(七月)

65 航天飞机的飞行准备 DATE=7-4-01 TITLE=EXPLORATIONS #1959 - Preparing Shuttle for Space Flight BYLINE=Paul Thompson VOICE ONE: This is Shirley Griffith. VOICE TWO: And this is Steve Ember wi

发表于:2019-01-30 / 阅读(60) / 评论(0) 分类 科技之光