美国国家公共电台 NPR Experts Say Denuclearizing North Korea Is No Small Task

STEVE INSKEEP, HOST: As a possible summit approaches between President Trump and North Korea's leader, a poem that kids learn in school comes to mind. The poem says, in its entirety, so much depends upon a red wheelbarrow glazed with rainwater beside

Medieval siege 中世纪攻城战-1

Knights in shining armor, charging each other in great pitched battles, that is the popular view of warfare in the Middle Ages. In reality, most medieval conflicts involved the attacking of castles, a

Medieval siege 中世纪攻城战-2

In the year 1304, Edward Longshanks, more formally known as King Edward I of England, mounted the greatest siege of his reign against the Scots and their castle at Stirling. The attack dragged on. Imp

Medieval siege 中世纪攻城战-3

Trebuchets began in the Far East, in China. But what they were there, were hand-pulled machines, worked by quite large teams of men.

Medieval siege 中世纪攻城战-4

At the end of the 13th century, what was the effective range of an archer, and what was the effective range of a trebuchet. The historical reports differ.

Medieval siege 中世纪攻城战-5

With the manuscript as a starting point, Wayne used a combination of engineering theory and trial and error to come up with a working model.

Medieval siege 中世纪攻城战-6

But the throwing arm will be made from a more light-weight wood - Douglas fir. Wayne calculates that a tree trunk of at least 2 feet in diameter is needed to withstand the stresses of hurling 250-poun

Medieval siege 中世纪攻城战-7

Renaud was left with no alternative but to hope that a couple of planks will be strong enough to splint the weakened throwing arm. Finally work starts on raising the great trestle s. With each passing

Medieval siege 中世纪攻城战-8

Even with 12 timber framers pulling, the firing pin won't budge . It is quite normal that I mean the trigger first is stiff, we found that at home. It takes a lot of efforts which is as well as in som

VOA慢速英语2015 US Restaurant Serves Medieval Art of Fighting

US Restaurant Serves Medieval Art of Fighting European martial arts, unlike popular Asian martial arts, are not widely practiced and are unknown to most people. But, a restaurant near Washington is the center of an effort to make the ancient fighting

Medieval siege 中世纪攻城战-11

...one, fire in the hole! Oh, yeah. Renaud’s optimism is justified. The missile falls just a few yards short of the wall and a bit to the right. The team decides to give it one more day. But the nex

Medieval siege 中世纪攻城战-9

Well it's gonna fit. Some point is gonna found. We're off the ground here. After last night's narrow miss,Wayne's trebuchet is repositioned to be more in line with the target. All we're doing is shift

Medieval siege 中世纪攻城战-10

Come and take a look at the rocks over here. It just pulverize d the stone on the inside. It confirmed what we came here to prove, didn't it? We had a lovely hit smacking in the middle and it smashed

Medieval siege 中世纪攻城战- 12 (end)

In terms of the kind of dialogue that existed between attack and defense, it is very clear now to me that the appearance of trebuchet on the scene shifted that balance radically in favor of attack. It

VOA标准英语2009年-London Museum Unveils Medieval, Renais

Rachel Smalley | London 21 December 2009 One of the exhibits at the Victoria and Albert Museum London's Victoria and Albert Museum claims to be the world's greatest museum of art and design. With artifacts dating back 3000 years, it has a collection

2017年CRI China remains persistent in denuclearizing Korean Peninsula: Xi

Chinese President Xi Jinping told his U.S. counterpart, Donald Trump, in a telephone conversation late Wednesday that Beijing remains persistent on the denuclearization of the Korean Peninsula. CRI's Yu Yang has more. During the phone conversation, X

VOA常速英语2007年-New Yorkers Experience Medieval Europe in Museu

By Liu Enming New York 03 December 2007 New York City's Manhattan can at times seem all business and flashy pleasure, a burgeoning island of skyscrapers and fast-paced modern life. But there are hidden treasures of history and tranquility awaiting qu

GRE词根词汇：ev

本文为大家准备了GRE词根词汇：ev，便于考生GRE备考。 ev = age 年龄，寿命，时代，时期 471. longevity〔 long 长，ev 年龄，寿命，-ity 名词后缀」长寿，长命472. longevous〔 long 长， ev 寿命，-ous 形容

Never Sell your Soul

又到一年毕业季，你准备好踏入社会的大门了吗？你设想过自己将要成为什么样的人吗？当人们向惠普公司前CEO卡莉费奥瑞娜询问职业生涯的意见时，她常常告诉大家，不要放弃你的内在本性

美国国家公共电台 NPR A Blue Clue In Medieval Teeth May Bespeak A Woman's Artistry Circa A.D. 1000

ARI SHAPIRO, HOST: Centuries ago in the Middle Ages, religious scribes labored over lavishly illustrated books. Most of these illuminated manuscripts were made by anonymous artists. Now scientists say they have a new kind of evidence that could revea