Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a thousandth of a millimeter: a pinhead is about a millimeter across. Rod-shaped bacteria are u

发表于:2018-11-28 / 阅读(443) / 评论(0) 分类 新概念优美背诵短文50篇

1. At least two people are dead and dozens more injured in a pileup involving at least one hundred vehicles that forced the closing of interstate 10 in southeast Texas. The Texas Department of Public Safety says the cars and trucks crashed in very de

发表于:2018-12-15 / 阅读(98) / 评论(0) 分类 美联社新闻一分钟2012(十一月)

Technology Report - IBM Says Computers Will See, Taste, Smell, Touch and Hear Things Better 科技报道 - IBM预测5年内改变世界的五大新技术 From VOA Learning English, this is the Technology Report in Special English. 这里是美国之音

发表于:2018-12-16 / 阅读(68) / 评论(0) 分类 2013年VOA慢速英语(二)月

Iraqi President: Extremists Have United Iraqi Factions 伊拉克总统称极端主义分子团结了伊拉克各派系 Iraqi President Fouad Maasum said the barbarity of the militants who have taken control of one-third of Iraq and a part of Syria ha

发表于:2018-12-16 / 阅读(43) / 评论(0) 分类 VOA标准英语2014年(十月)

Security forces in Pakistan have begun an operation against pro-Taliban militants in a tribal region bordering Afghanistan and serving as a major route for trade and supplies to U.S-led foreign forces based there. The offensive has provoked an al-Qai

发表于:2018-12-19 / 阅读(40) / 评论(0) 分类 VOA双语新闻 2008年6月

Of the many puzzles mathematicians ponder, one is new ways to tie knots. There are more than six billion different types of knots that have been tabulated by mathematicians. Six billion. David Leigh, a chemist at the University of Manchester in the U

发表于:2018-12-24 / 阅读(77) / 评论(0) 分类 2017年Scientific American(一)月

How Does Ice Cool Drinks? Heres something we tend to take for granted: drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work? Heat is a measure of molecular activity: the faster a

发表于:2018-12-31 / 阅读(45) / 评论(0) 分类 英语听力文摘 English Digest

Why Does Plastic Wrap Cling To Itself? What makes kitchen plastic wrap cling so maddeningly to itself, and so conveniently to the sides of bowls and plates? Plastic wrap clings for two reasons: its elastic and its sticky. That probably seems pretty o

发表于:2018-12-31 / 阅读(53) / 评论(0) 分类 英语听力文摘 English Digest

By Anjana Pasricha New Delhi 18 January 2006 India says it is optimistic about its peace process with Pakistan after holding two days of talks with its nuclear rival. But India has accused Pakistan of

发表于:2019-01-09 / 阅读(141) / 评论(0) 分类 2006年VOA标准英语(一月)

By Sonja Pace Jerusalem 24 July 2006 Israeli Foreign Affairs Minister Tzipi Livni, right, meets U.S. Secretary of State Condoleezza Rice in Jerusalem Secretary of State Condoleeza Rice is in Israel for talks on how to end the conflict with Hezbollah

发表于:2019-01-12 / 阅读(105) / 评论(0) 分类 2006年VOA标准英语(七月)

Classes Resume in War-Torn Kobani KOBANI, SYRIA With Syria in its fifth year of conflict, most of the norms of prewar life are gone. Many schools, clinics and other social services have long been shuttered or bombed. But in the aftermath of fighting

发表于:2019-01-14 / 阅读(72) / 评论(0) 分类 VOA标准英语2015年(四月)

1. A wildfire in southern California, San Jacinto, mountains has grown to nearly 30 square miles. But the fire fighters say they are making progress. The blaze is almost half contained and several evacuation orders have now been lifted. The fire has

发表于:2019-01-16 / 阅读(109) / 评论(0) 分类 美联社新闻一分钟2013(八月)

By Tom Rivers London 07 October 2009 Ada Yonath (file photo) Two Americans and one Israeli share this year's Nobel Prize in Chemistry for their work showing how the DNA code is translated into life itself. Americans Venkatraman Ramakrishnan and Thom

发表于:2019-02-03 / 阅读(75) / 评论(0) 分类 VOA标准英语2009年(十月)

Officials say up to 49 Taliban insurgents and five Afghan soldiers have been killed following an attack by the Taliban in the eastern Afghan province of Paktiya. One soldier was captured during the fighting. Several foreign militants were also involv

发表于:2019-02-04 / 阅读(107) / 评论(0) 分类 CCTV9英语新闻2014年04月

俄欲与美联手打击叙反叛分子 美体操女将西蒙强势扫4金 时间:2016-08-21 08:34来源:未知 作者:voa365 点击: 149 次 音频下载 BBC news with Jonathan Izard. Russian bomber plans have begun using an airbase in Iran to launc

发表于:2019-02-14 / 阅读(48) / 评论(0) 分类 中英双语新闻

Rev Up Photosynthesis To Boost Crop Yields 提高光合作用能使作物增加产量 Photosynthesis is surprisingly inefficient, only of the order of one to two percent. And one of the main culprits is an enzyme called RuBisCo. 光合作用效率低得

发表于:2019-02-14 / 阅读(67) / 评论(0) 分类 2018年科学美国人4月

What is Air? 空气 D: Strictly speaking, air is mostly nitrogenabout seventy-eight percent, and about twenty-one percent oxygen, which leaves about one percent of other stuff, like water vapor and carbon dioxide. Y: So air is mostly empty space? D:

发表于:2019-02-16 / 阅读(65) / 评论(0) 分类 英语听力文摘 English Digest

今天我们要学的词是restore。Restore, 意思是恢复。索马里正在集中力量打击恐怖组织青年党。 The fight against al-Shabab militants presents a historic opportunity to restore peace in Somalia, 对青年党的打击为恢复索

发表于:2019-02-18 / 阅读(58) / 评论(0) 分类 英语单词荟萃

Robot Attack 纳米机器人的研制属于分子仿生学的范畴,它根据分子水平的生物学原理为设计原型,设计制造可对纳米空间进行操作的功能分子器件。纳米生物学的近期设想,是在纳米尺度上应用

发表于:2019-02-24 / 阅读(302) / 评论(0) 分类 英语听力文摘 English Digest

Honey has been around for a very long time. Cave paintings in Spain from over ten thousand years ago show people harvesting honey. Today honey is mostly used for its distinctive flavor, but for baking it has another advantage as well: baked goods mad

发表于:2019-03-12 / 阅读(193) / 评论(0) 分类 英语时差8,16