[网络] 亚乙基脯氨酸

2006年VOA标准英语- Deadline Nears for Kidnapped American Jou

By Malini Bawa Washington, DC 20 January 2006 watch Journalist report An insurgent group says it will kill a kidnapped American journalist Friday, and deadly bombings claim more lives in Baghdad durin

发表于:2019-01-11 / 阅读(96) / 评论(0)

2006年VOA标准英语（一月）

2006年VOA标准英语-UN Secretary-General Warns of Nuclear Prolifera

By Lisa Schlein Geneva 21 June 2006 U.N. Secretary-General Kofi Annan warns that the spread of nuclear weapons threatens to propel the world into a state of crisis. In a speech to the U.N. Conference on Disarmament, the secretary-general mentioned N

发表于:2019-01-13 / 阅读(87) / 评论(0)

2006年VOA标准英语（六月）

VOA标准英语2009年-Aid Groups Want Obama to Take New Approach to C

A coalition of religious groups and refugee organizations wants U.S. President-elect Barack Obama to take a new approach to Chad. The coalition of aid groups says the Obama administration should set a new foreign policy agenda for Chad that includes

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VOA标准英语2009年(一月)

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(60) / 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)

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