乙烯原

VOA慢速英语2012 THIS IS AMERICA - Second Chances for Prisoners, Horses and the Unemployed; Dogs Help Children Learn to Read

THIS IS AMERICA - Second Chances for Prisoners, Horses and the Unemployed; Dogs Help Children Learn to Read CAROLYN PRESUTTI: Welcome to THIS IS AMERICA in VOA Special English. Im Carloyn Presutti. STEVE EMBER: And Im Steve Ember. This week on our sh

发表于:2019-01-12 / 阅读(59) / 评论(0)

2012年VOA慢速英语(八)月

2006年VOA标准英语-Kenny Rogers Releases Water and Bridges

By Mary Morningstar Washington 01 April 2006 Kenny Rogers Legendary singer Kenny Rogers has recorded more than 60 albums that have sold over 100 million copies worldwide. He made his first appearance

发表于:2019-01-31 / 阅读(104) / 评论(0)

2006年VOA标准英语（四月）

万物简史第227期:把铅撵出去(16)

On its website, a history of the company makes no mention of leador indeed of Thomas Midgleybut simply refers to the original product as containing a certain combination of chemicals. 在它的网站上，公司的历史没有提及铅──也没有提

发表于:2019-02-17 / 阅读(53) / 评论(0)

万物简史

万物简史第225期:把铅撵出去(14)

By counting back through these layers and measuring the amount of lead in each, he could work out global lead concentrations at any time for hundreds, or even thousands, of years. The notion became the foundation of ice core studies, on which much mo

发表于:2019-02-17 / 阅读(59) / 评论(0)

万物简史

万物简史第213期:把铅撵出去(2)

Lead is a neurotoxin. Get too much of it and you can irreparably damage the brain and central nervous system. Among the many symptoms associated with overexposure are blindness, insomnia, kidney failure, hearing loss, cancer, palsies, and convulsions

发表于:2019-02-17 / 阅读(53) / 评论(0)

万物简史

TED演讲获奖青少年,科技在行动(1)

If you were going to a restaurant and wanted a healthier option, 如果你去饭店，你想吃得健康一点， which would you choose, grilled or fried chicken? 你会选择哪种食品呢，烤鸡还是炸鸡？ Now most people would answer grill

发表于:2019-02-21 / 阅读(68) / 评论(0)

TED演讲教育篇

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agent, execution

algebraic inequality

angiospastic constitution