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数学英语 40 How to Divide Fractions

by Jason Marshall A few months ago we talked about how to multiply fractions. Now that were comfortable doing this and weve talked about a few applications of multiplying fractions such as how to convert units and how to estimate how fast someone is

发表于:2018-12-07 / 阅读(282) / 评论(0)

数学英语

数学英语 41 What are Statistics and Estimators?

by Jason Marshall Sometimes statistics* seems magical. Of course, there isnt really anything magical going onbut the fact that statistical methods can be used to pull useful information out of a hatful of messy data is, at a minimum, remarkable. And,

发表于:2018-12-07 / 阅读(294) / 评论(0)

数学英语

数学英语 34 How to Multiply Fractions

by Jason Marshall In the last article, Is Multiplication Repeated Addition? we talked about what it really means to multiply two numbers. We found that the conventional meaning of multiplicationrepeated additionbreaks down when multiplying fractions,

发表于:2018-12-07 / 阅读(234) / 评论(0)

数学英语

数学英语 17 What Are Fractions?

图片1 图片2 by Jason Marshall Do you frequently find yourself at restaurants with friends fumbling to figure out how to split the bill and calculate the tip? Have you ever resorted to seeking advice from your smart phone? Dont worry, we all have.

发表于:2019-01-02 / 阅读(397) / 评论(0)

数学英语

英文乡村歌曲：Jack Johnson - Inaudible Melodies

Brushfire fairytales Itsy bitsy diamond wells Big fat hurricanes Yellow-bellied given names Well, shortcuts can slow you down And in the end we're bound To rebound off of we Well, dust off your thinking caps Solar-powered plastic plants Pretty pictur

发表于:2019-01-11 / 阅读(263) / 评论(0)

美国乡村音乐

PBS高端访谈:科技正在转化为简易的医疗急救措施

GWEN IFILL: When it comes to global health, much attention is now focused on Ebola. But more routine diseases take a toll on the world's poorest people every day. In Seattle, there's a not-for-profit group trying to develop new tools and medicines to

发表于:2019-01-27 / 阅读(253) / 评论(0)

PBS访谈健康系列

VOA标准英语2010年-Falling New Auto Sales in US Could Sig

The auto fleet in the United States is shrinking. For the first time since World War II, more used cars were scrapped than new cars sold in 2009. The fleet decreased from an all-time high in 2008 of 250 million vehicles to 246 million last year. Driv

发表于:2019-02-18 / 阅读(307) / 评论(0)

VOA标准英语2010年(一月)

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bash one's head against a wall

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