国家地理:July 4th: Exploring the Myth 美国国庆

The 4th of July is America's birthday bash . This summer ritual of picnics, parades and pageantry celebrates the formal adoption of the Declaration of Independence in 1776, the most cherished document in our history. It declared an end to England's c

20 The Historical Significance of American Revolution

20 The Historical Significance of American Revolution The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events covering a number of years, a multiplicity of person

英语语法：89 Stacked Modifiers

Todays episode concerns a what-you-may-have-been-wondering-about topic. That sure was a mouthful, and it illustrates the problem of stacked modifiers, which occurs when you string together too many words to describe a noun at the end of the mouthful.

英语语法：50 Funny Misplaced Modifiers

Grammar Girl here. Today guest-writer Bonnie Trenga is going to help us take a break from serious grammar and instead delve into the world of comedysome intentional, some not. Groucho Marx said it best: One morning I shot an elephant in my pajamas. H

2007年VOA标准英语-Former CIA Officer Testifies White House 'Reckl

By Dan Robinson Capitiol Hill 16 March 2007 Former undercover CIA officer Valerie Plame, who has been at the center of a controversy involving the role White House officials played in revealing her identity, has testified in public for the first tim

2006年VOA标准英语-WTO Intensifies Geneva Talks, Cancels Mini

By Kurt Achin Seoul 27 April 2006 The World Trade Organization has canceled a minister-level meeting scheduled for late April, admitting that members are not ready to meet a deadline for a trade liber

2006年VOA标准英语-Debate Intensifies Over US Troop Withdrawals fr

By Meredith Buel Washington 17 November 2006 Recent elections for the U.S. Congress and continuing bloodshed in Baghdad have renewed debate over whether there should be a timetable for American-led coalition forces to leave Iraq. Many critics of the

VOA标准英语2009年-North Korea Notifies World Agencies of Satellit

North Korea has told international agencies it will conduct its planned launch of what Pyongyang says is a satellite in early April. North Korea's launch of a long-range rocket became all but inevitable as Pyongyang informed international agencies i

VOA标准英语2011--NASA Identifies Shuttle Endeavour's Heat

NASA Identifies Shuttle Endeavour's Heater Glitch NASA says engineers at Kennedy Space Center believe they have identified the cause of the heater failure that forced the postponement of the launch of the shuttle Endeavour. NASA technicians say the f

Artificial Leaf Turns Sunlight into Electric Power

Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani

ICRC Seeks Access to All of Libya as Conflict Intensifies

The International Committee of the Red Cross is appealing for access to all areas of conflict in Libya as fighting intensifies. The president of the ICRC, Jakob Kellenberger, says the conflict in Libya has descended into civil war. He says he is alar

英语语法：70 Misplaced Modifiers

Grammar Girl here. Today's topic is misplaced modifiers. Of all the writing errors you can make, misplaced modifiers are among the most likely to confuse your readers, but they're also kind of fun because misplaced modifiers can give your sentences s

2006年VOA标准英语-Moussaoui Testifies at 9/11 Sentencing Tri

By Jim Malone Washington 13 April 2006 Confessed al-Qaida conspirator Zacarias Moussaoui complained about his defense lawyers Thursday during his sentencing trial in Alexandria, Virginia, just outside

2006年VOA标准英语-US Senate Ratifies Cybercrime Treaty; Assesses

By Deborah Tate Capitol Hill 04 August 2006 Among the last issues to come before the U.S. Senate before lawmakers began their August recess were cybercrime and cybersecurity. Senators ratified an international treaty aimed at cracking down on crimes

揭秘新科技 Wifi信号能治病

Researchers have developed a method to activate electronic implants in the body and eliminate bacterial infections using a wireless signal。 研究者已经开发了一种运用无线信号激活人体中电子植入物来消除细菌感染的方法。

Wifi信号弱？放置地点有问题

Deciding where to place a Wi-Fi router at home to minimise signal blackspots is a fine art. But a physicist has attempted to tackle the problem by mathematically working out the optimum position for a router. He studied how walls and reflections affe

US Identifies Marines in Urination Video

U.S. military officials say they have identified the four Marines seen on video urinating on the bodies of dead Afghan Taliban fighters. The Naval Criminal Investigative Service, heading the main inquiry into the video, has also reportedly questioned

VOA标准英语2010年-New Negotiations Aim at Cyprus Reunifi

Leaders of the Greek and Turkish communities of Cyprus are starting a new series of negotiations aimed at re-unifying the divided island. Cypriot President Demetris Christofias and Turkish Cypriot leader Mehmet-Ali Talat have begun a series of three-

2006年VOA标准英语-US Army Intensifies 'Train the Trainers' Progra

By Al Pessin Kansas 18 December 2006 Army training troops who will serve as advisers to the Iraqis are seen in Fort Riley, Kansas, 28 Oct 2006 In the raging debate over the future of U.S. policy toward Iraq, there is one point on which all sides see

【趣谈英语】关于黑脉金斑蝶的奇事-A Myth About Monarchs

Pre-Listening Vocabulary ingest: to eat or drink tell apart: to distinguish a difference between people and things hind: back non-toxic: not poisonous resemble: to look alike mimicry: a survival technique where one species evolves to resemble another