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But how did one man and a spear produce the huge force behind this blow? The answer lies with small bits of ivory like this. They were once part of an atlatl, or spear thrower. An atlatl acts as a sort of catapult, magnifying the strength of a hunter
探索与发现2012年
Welcome to Antarctica, said Annie. Jack and Annie were bundled in cold-weather gear. They both wore snow pants, gloves, boots withspikes, and thick red parkas with hoods. Gogglescovered their eyes, and wool masks covered theirmouths and noses. A hike
汪培珽儿童英文分级书单《神奇树屋》
Benedict Bids Farewell; Cardinals Face A Difficult Choice Pope Benedict is bidding farewell and preparing for the time when he will no longer lead the world's 1.2 billion Catholics. But Vatican officials say that as pope emeritus he will still wear a
VOA标准英语2013年(三月)
文本： Ah! Is air the secret ingredient in soft ice cream? Lets hear it again. _Air? _Air. _Yes. Air gives ice cream that unique light,fluffy texture, and thats the secret of making creamy ice cream. You need small ice crystal and small air bubble
跟着英剧练发音
During the last ice age, rapid swings in temperature occurred within decades or less, meaning populations of organisms had to adjust quickly to new environments or face extinction. 在最后一个冰河世纪中，温度在数十年甚至更短的时间
初学者听力文摘精选
By Mike O'Sullivan Los Angeles 08 July 2006 Officials of a leading U.S. Hispanic organization say the mass demonstrations for immigrant rights held earlier this year are giving way to an effort to mobilize the vote among Hispanics. Officials of the
2006年VOA标准英语（七月）
By Doug Levine Washington 21 March 2007 It's official! The Police are back and they're going on tour. As VOA's Doug Levine tells us, the group's appearance at February's Grammy Awards was just a preview of their long-awaited reunion. Andy Summers, St
2007年VOA标准英语（三月）
A: I need help in ordering my office supplies. B: You can print out a copy of the Order Supply Form from our company web site and turn in into me. What will you be needing? A: I need ink cartridges, staples, and Post-its. B: Will you need all of them
英语情景对话-工作
A: Excuse me. I was wondering how to order office supplies. B: We have a requisition form on the company web site. What type of supplies do you need? A: I need paper, ink cartridges, and paper clips. B: How quickly will you need your supplies? A: I n
英语情景对话-工作
VOICE ONE: This is SCIENCE IN THE NEWS in VOA Special English. I'm Doug Johnson. VOICE TWO: And I'm Faith Lapidus. This week, we will tell about ice loss in the Arctic Sea. We also will tell about a campaign to improve treatment of snakebites. And w
VOA慢速英语2009年（五）月
By Barry Wood San Francisco, California 29 November 2006 watch VoiceOver Internet report In September 2005 eBay, the Silicon Valley-based on-line auction site, stunned California's high-tech community by spending $2.5 billion to buy a company called
2006年VOA标准英语（十一月)
By David Gollust State Department 29 August 2006 Secretary of State Condoleezza Rice told a war veterans group Tuesday that a premature U.S. troop withdrawal from Iraq would cause immeasurable harm to U.S. interests. Domestic political pressure for
2006年VOA标准英语（八月）
By Patricia Nunan Kathmandu 22 April 2006 Nepalese protesters throng a street as smoke billows from a roadblock made of burning tires, set up by protesters in defiance of a curfew called by the govern
2006年VOA标准英语（四月）
By Nancy-Amelia Collins Jakarta 20 June 2008 Indonesian police have arrested the former deputy head of the National Intelligence Agency for involvement in the 2004 murder of prominent activist Munir Thalib. VOA's Nancy-Amelia Collins in Jakarta has
VOA标准英语2008年（六月）
VOA标准英语2012--Unconventional Voices Make Points in New Hampshire The American presidential election isn't until November of this year. But the nation's first primary election takes place on Tuesday in the northeastern state of New Hampshire. S
VOA标准英语2012年(一月)
Ice Age Melt Offers Future Climate Clues University of Wisconsin geologist Anders Carlson studies ice sheet melt from land and ocean sediment cores. His study describes what prehistoric Earth was like in North America and Northern Europe some 140,000
VOA标准英语2012年(八月)
U.S. Secretary of State Condoleezza Rice is joining U.N. Security Council and bilateral diplomacy on the Gaza crisis in New York. The United States is seeking a deal on Gaza that would end Hamas rocket fire into Israel, halt arms smuggling to the mi
VOA标准英语2009年(一月)
U.S. Vice President Joseph Biden is heading to Brussels for talks Tuesday with NATO allies as Washington seeks greater European support in Afghanistan. Possible U.S. missile-defense systems and ties with Russia may also be on the menu. US Vice Presi
VOA标准英语2009年(三月)
Venezuelan Election is Again Choice Between Socialism, Capitalism Business has not been good for Rotzen Villabon, who owns a gift shop called Viqiu. He needs dollars to import products made in China but he can't find any at the official exchange rate
VOA标准英语2013年(四月)
DAVID GREENE, HOST: More and more businesses are being raided as the Trump administration goes after employers who knowingly hire unauthorized immigrants. The biggest bust of all targeted a trailer manufacturer in northeast Texas. Immigration police
2018年NPR美国国家公共电台10月