43.Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root s

发表于:2018-11-28 / 阅读(369) / 评论(0) 分类 新概念优美背诵短文50篇

by Jason Marshall In todays article, were wrapping-up our introductory series on fundamental statistics by talking about how knowledge of statistical quantities like the mean and standard deviation can help you understand the significance of the late

发表于:2018-12-07 / 阅读(56) / 评论(0) 分类 数学英语

斑点鬣狗会咕哝咕哝叫,会吼叫,可是你知道吗?它们最有名的是笑声,是的,咯咯的笑声。 科学家发现,这种动物会用笑声作为语言来交流诸如年龄、身份和地位等信息,这样,就知道把猎

发表于:2019-01-02 / 阅读(104) / 评论(0) 分类 60秒科学

By Rebecca Ward Heilingendamm, Germany 08 June 2007 While leaders from the eight industrialized nations meet behind closed doors -- journalists wait for a headline or a photo-op to send home to their editors. But at a media event of this scale -- wi

发表于:2019-01-07 / 阅读(127) / 评论(0) 分类 2007年VOA标准英语(六月)

We will begin tonight Keeping Them Honest on campaigns that love the polls but only when the polls are going their way. Right now, that would be the Romney campaign. New polling in battleground states tonight, the latest CNN/ORC survey in Ohio done e

发表于:2019-01-08 / 阅读(120) / 评论(0) 分类 CNN2012年(十)月

AS IT IS 2013-06-21 Debating the "Bible" of American Psychiatry From VOA Learning English this is As It Is. Welcome to the show. Im Caty Weaver. The Diagnostic and Statistical Manual of Mental Disorders is a guide to help doctors identify mental

发表于:2019-01-12 / 阅读(58) / 评论(0) 分类 2013年VOA慢速英语(六)月

AS IT IS 2014-09-24 Experts: Population to Grow from 7 to 11 Billion 专家预测人口或从70亿增长到110亿 Our planet is home to about seven billion people. Since the 1990s, population experts have predicted the number would grow to nine billi

发表于:2019-01-12 / 阅读(60) / 评论(0) 分类 2014年VOA慢速英语(九)月

Study finds chest compressions are the real life-saver Art Chimes | St. Louis, Missouri 29 July 2010 Cardiopulmonary resuscitation, or CPR, has been around in its modern form for about 50 years. Its rhythms of chest compressions and mouth-to-mouth br

发表于:2019-01-13 / 阅读(100) / 评论(0) 分类 VOA标准英语2010年(七)月

Baseball Manager Builds Winning Team Unconventionally in 'Moneyball' Brad Pitt is getting rave reviews and there's 'buzz' about a possible Oscar nomination for his performance in a new film set inside American professional baseball. Moneyball is base

发表于:2019-01-13 / 阅读(77) / 评论(0) 分类 VOA标准英语2011年(九月)

Mega-Fires Pose Threat to Environment, Economy Experts gathered this week in Sun City, South Africa, to discuss wildfires. But a new report also focused on a growing phenomenon called mega-fires. The report describes mega-fires as extraordinary confl

发表于:2019-01-14 / 阅读(71) / 评论(0) 分类 VOA标准英语2011年(五月)

Indias Food Security Plan Met With Skepticism With food inflation hitting 8.25 percent in May, New Delhi resident Geeta Kashyap bargains even harder at the market to keep costs down. As food prices rise, she is left to wonder how the poorest in India

发表于:2019-01-14 / 阅读(66) / 评论(0) 分类 VOA标准英语2013年(七月)

Dialogue 1 Jingjing: Good afternoon, Mr Karon. 京晶:下午好,卡伦先生。 Mark: Call me Mark. 马克:叫我马克就好。 Jingjing: Ok, Mark. I'm Jingjing. I see you've brought a copy of your rsume. Do you mind if I look it over for a mi

发表于:2019-01-15 / 阅读(62) / 评论(0) 分类 英语PK台

LAUREN FRAYER, HOST: By now, you'd better have your holiday shopping done. Maybe you did more of it online this year. Easy for you but bad for your local mall - brick-and-mortar stores are losing jobs. And it turns out some workers are hit harder tha

发表于:2019-01-16 / 阅读(73) / 评论(0) 分类 2017年NPR美国国家公共电台12月

Coffee is one of the world's most widely-enjoyed beverages. Flavor aside, scientists have recognized it as a complex blend of chemical compounds with potential health effects, both good and bad. Now, new research suggests that if you drink enough cof

发表于:2019-01-19 / 阅读(88) / 评论(0) 分类 VOA双语新闻 2010年7月

By Lisa Schlein Geneva 08 May 2008 The U.N. Children's Fund estimates one-third of all those killed by Cyclone Nargis in Burma are children. Burmese authorities report more than 22,000 people lost their lives and more than 40,000 are still missing. L

发表于:2019-01-30 / 阅读(52) / 评论(0) 分类 VOA标准英语2008年(五月)

By Tendai Maphosa London 23 November 2007 A former United Nations Special Envoy for AIDS in Africa, Stephen Lewis warns that revised UNAIDS HIV statistics should not be seen as a signal that the fight against the pandemic can be relaxed. He says that

发表于:2019-01-31 / 阅读(72) / 评论(0) 分类 VOA常速英语2007年(十一月)

By Brian Wagner Caracas 02 December 2007 Venezuelans are casting ballots on a controversial reform plan that would allow President Hugo Chavez to seek re-election indefinitely and extend his socialist policies.Pro-Chavez government officials say that

发表于:2019-01-31 / 阅读(60) / 评论(0) 分类 VOA常速英语2007年(十二月)

Researchers at Boston University have identified a kind of genetic signature in people who are likely to live to age 100 or older. The technique may also help doctors predict whether you're likely to get a disease, decades before the symptoms show up

发表于:2019-02-03 / 阅读(122) / 评论(0) 分类 VOA标准英语2010年(七)月

The U.N. Children's Fund estimates one-third of all those killed by Cyclone Nargis in Burma are children. Burmese authorities report more than 22,000 people lost their lives and more than 40,000 are still missing. 联合国儿童基金会估计,热带

发表于:2019-02-14 / 阅读(63) / 评论(0) 分类 VOA双语新闻 2008年5月

Drones Could Help Biologists Tally Birds Ecologists crouching quietly amidst vegetation, using binoculars to tally birds in a roost, may soon be a charming relic of the past. Because a new study shows that, when it comes to getting an accurate avian

发表于:2019-02-14 / 阅读(82) / 评论(0) 分类 2018年科学美国人3月