by Jason Marshall Weve now talked about three methods for calculating average values: the mean, median, and mode (affectionately known as the three Ms). So, are we done? Is that everything we could ever want to know about interpreting average values?

发表于:2018-12-07 / 阅读(72) / 评论(0) 分类 数学英语

This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? The 2011 Nobel Prize in chemistry goes to Daniel Schechtman of the TechnionIsrael Institute of Technology in Haifa. Schechtman discovered what are called quasicrystals.

发表于:2019-01-08 / 阅读(72) / 评论(0) 分类 Scientific American(十)月

Agriculture Report - Improving 'Feed Efficiency' in Cattle 农业报道 - 提高牛的饲养效率 From VOA Learning English, this is the Agriculture Report in Special English. 这里是美国之音慢速英语农业报道。 Animal feed is the bigge

发表于:2019-01-12 / 阅读(68) / 评论(0) 分类 2012年VOA慢速英语(十一)月

'Up All Night' Melds Country With Modern Rock Edge Up All Night, has brought the Georgia native praise from many music critics. Country Music Televisions website writer Chet Flippo said, I have to say I have not heard a more compelling and appealing

发表于:2019-01-13 / 阅读(32) / 评论(0) 分类 VOA标准英语2012年(五月)

First Solar Sail to be Launched into Orbit from Russian Submarine 俄潜艇首发太阳反射器进入轨道 A solar sail might do for space missions what fabric sails once did for sea travel.It would

发表于:2019-01-31 / 阅读(76) / 评论(0) 分类 VOA2005(下)--环境科学探索

American Millionaire space tourist Dennis Tito has unveiled plans to send a man and a woman around Mars in January 2018. The couple will embark on the 500-day journey which zooms past Mars and swings back to Earth as part of a historic Mission for Am

发表于:2019-02-14 / 阅读(96) / 评论(0) 分类 英闻天下