ARI SHAPIRO, HOST: For decades, the Colorado River has fed growing cities from Denver to Los Angeles, and a lot of the produce in grocery stores across the country right now was grown with Colorado River water. Now with climate change and severe drou

发表于:2018-12-17 / 阅读(44) / 评论(0) 分类 2017年NPR美国国家公共电台1月

When Michael Phelps is out of the water, he towers over mere non-Olympic mortals. Then he slips into the pool, and makes record-breaking speed seem effortless. His height, it turns out, is no accident. According to research published in The Journal o

发表于:2018-12-24 / 阅读(51) / 评论(0) 分类 Scientific American(七)月

by Jason Marshall In the last two articles weve learned how to calculate two types of average values: the mean and the median. Today, were going to continue where we left off and talk about how median averaging can be useful in everyday, real life si

发表于:2019-01-02 / 阅读(112) / 评论(0) 分类 数学英语

By Cathy Majtenyi Nairobi 19 May 2008 Fuel efficient stoves and ceramic water purifiers are two examples of low-tech innovations that can help people in poor countries improve their quality of life. Because what is known as appropriate technology usu

发表于:2019-01-10 / 阅读(62) / 评论(0) 分类 VOA标准英语2008年(五月)

Our manager at the restaurant where I worked was a much beloved, jovial man. But there was one subject you didn't dare discuss in front of him -- his height. Or, should I say, his lack of it. One day, he stormed through the door and announced angrily

发表于:2019-01-22 / 阅读(46) / 评论(0) 分类 英语笑话(MP3+文本)

The next time someone asks you how tall you are, keep in mind that your answer might depend on the time of day. You see, in the morning, when you wake up, you're taller than at night, when you go to bed. How can this be? Well, the spine is made of tw

发表于:2019-02-15 / 阅读(41) / 评论(0) 分类 英语时差8,16