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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

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Knot Not Easy to Knot 看结容易 打结难 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 che

Powerless Aircraft Sets Altitude Record

Two pilots recently set a new altitude world record for gliders. A glider is an aircraft that does not have an engine. They are pulled into the air by powered airplanes and then released. They are designed to ride warm, rising air to gain altitude. T

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By Nico Colombant Kinshasa 31 October 2006 Election officials in the Democratic Republic of Congo have denounced the announcement of speculative results, following Sunday's decisive second-round presidential election. They have called for patience a

voa标准英语2008-Early Returns Show Tight Race in Ghana President

In Ghana, election officials are counting the votes from Sunday's elections and unofficial returns show that with more than one-third of the constituencies tabulated, two leading candidates are in a tight race for the presidency. Election observers

VOA标准英语2013--Vote Counting Underway After Big Voter Turnout in Kenya

Vote Counting Underway After Big Voter Turnout in Kenya Voters began lining up in the early morning hours at this polling station in Gatundu. Huge turnout across the country overwhelmed polling stations, and many, like Lucas Nganga, waited hours to v

Chinese island province pilots in low-altitude test flight

HAIKOU, Jan. 28 (Xinhua) -- China's aviation authorities(民航当局) on Friday started to allow helicopters to fly in low-altitude airspace over the tourist island of Hainan on a trial basis for the first time. The aim is to eventually open a part

Low-altitude airspace to open up across China from 2013

SHENYANG, Aug. 23 (Xinhua) -- China will relax the ban on the use of low-altitude airspace across the country starting in 2013, the country's air traffic authorities said Thursday. A series of reforms will be implemented in five to ten years, creatin

Business Channel 2007-03-02&04

It's the worst one-day sell-off on Wall Street since after the 9/11 attacks. Stock prices plunged today across the board and around the world. The Dow Jones Industrial Average was down about 416 points at the closing bell and at one point it fell un

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By the time Terman was finished, he had sorted through the records of some 250,000 elementary and high school students, 当所有测试结束时，特曼已经得到了250 000名中小学学生的测试结果， and identified 1,470 children whose IQ

2006年VOA标准英语-Early Returns From Madagascar Election Show Pre

By Scott Bobb Johannesburg 04 December 2006 Madagascar President Marc Ravalomanana casts his ballot in Antananarivo, 3 Dec 2006 In Madagascar, preliminary returns from Sunday's presidential election show the incumbent in the lead. International obse

World's highest altitude swimming race kicks off

GUIDE, China, Jan. 12 (Xinhua) -- The 3rd International Extreme Race of Winter Swimming across Yellow River started here in northwest China's Qinghai Province on Saturday. Being hosted in Guide County at an altitude of 2,200 meters in Tibetan Plateau

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Britain's foreign secretary say he has serious concerns about election fraud allegations swirling after last month's Afghan presidential vote and David Miliband says a thorough investigation is required. David Miliband (File photo) Even before the A

关于乘机旅行的词汇

boarding check 登机牌 plane ticket 飞机票 flight, flying 飞行 bumpy flight 不平稳的飞行 smooth flight 平稳的飞行 ramp 扶梯 altitude, height 高度 extra flight 加班 non-stop flight 连续飞行 circling 盘旋 forced landing 迫降

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In Ghana, election officials are counting the votes from Sunday's elections and unofficial returns show that with more than one-third of the constituencies tabulated, two leading candidates are in a tight race for the presidency. 加纳的选举官员正

Obama, Romney exchange barbs as jobs number improves

Obama, Romney exchange barbs as jobs number improves WASHINGTON, Oct. 5 (Xinhua) -- U.S. President Barack Obama and his Republican challenger Mitt Romney intensified attacks against each other on Friday, as they reacted to a newly improved jobs numbe

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Wood, Stone, Steel, Glass 木材，石头，钢铁，玻璃 On May 19, 2001, the first Apple store opened in Tyson's Corner, Virginia, 2001年5月19日，第一家苹果零售店在弗吉尼亚州的泰森角开业了。 with gleaming white counters,

找谁倚靠(慢速)04：改变高度 Change altitude

Change altitude 改变高度 Rebecca had decided that her best chance of getting hired by a company doing geological survey work in the Alaskan wilderness was to earn a private license to fly twin-engine planes. 丽贝卡觉得，要想进入在阿拉斯