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WASHINGTON, May 20 (Xinhua) -- Two U.S. astronauts conducted the first of four spacewalks for space shuttle Endeavour's STS-134 mission on Friday morning, the U.S. National Aeronautics and Space Administration (NASA) said.According to the U.S. space agency, Endeavour's mission specialists Andrew Feustel and Greg Chamitoff completed the six-hour, 19-minute spacewalk at 9:29 a.m. EDT (1329 GMT). They successfully installed antennas for the External Wireless Communication system, routing cables, setting up the antenna, installing handrails, and connecting power cables.Because of a carbon dioxide sensor failure in Chamitoff's spacesuit, flight controllers limited his spacewalk time to about six hours 20 minutes, 10 minutes less than the planned six hours and 30 minutes. There was no indication his suit's carbon dioxide levels would rise. However, they deferred tasks to remove a micrometeoroid debris shield to access and attach some of the connection points.This was the 245th spacewalk conducted by U.S. astronauts. It was Feustel's fourth spacewalk for a total time of 27 hours and 17 minutes, and Chamitoff's first.Endeavour lifted off on Monday morning from Kennedy Space Center in Florida, to deliver to the International Space Station a 2-billion-dollar, multinational particle detector known as the Alpha Magnetic Spectrometer (AMS).AMS, a particle physics detector, is designed to search for various types of unusual matter by measuring cosmic rays. Its experiments are designed to help researchers study the formation of the universe and search for evidence of dark matter, strange matter and antimatter.

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LOS ANGELES, March 3 (Xinhua) -- More and more American adults are suffering from a decline in overall sleep duration, the U.S. Centers for Disease Control and Prevention (CDC) said on Thursday.It's recommended that adults should sleep seven to nine hours a night to maintain good health, but more than one-third of Americans do not meet that requirement, according to the CDC.Insufficient sleep poses a long-term heath threat and impairs work performance and the ability to drive safely, the CDC said.Chronic sleep loss also is associated with obesity, increased risk of death and other health problems, according to the CDC."Over the last 20 years there has been a decline in overall sleep duration in adults," said Lela McKnight-Eily, a clinical psychologist and epidemiologist at the CDC's National Center for Chronic Disease Prevention."Within our culture there seems to be a belief that sleep isn't a part of overall essential health," she said.McKnight-Eily and her colleagues studied the sleep habits of 74,571 adults in 12 states, 35.3 percent reported sleeping less than seven hours.In addition, 48 percent reported snoring, 37.9 percent said they fell asleep at least once during the day the previous month and 4.7 percent admitted to falling asleep at the wheel at least once.Drowsiness or nodding off while driving accounts for 1,550 deaths and 40,000 injuries a year, according to the U.S. Department of Transportation.To get enough sleep, Americans have to change lifestyle habits, including longer workdays and late nights on the computer, McKnight-Eily said, noting that too much screen time paring away much-needed sleep time.

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BEIJING, Feb. 26 (Xinhua) -- China's Ministry of Education said Friday that 34.29 million students graduated from the country's higher-learning institutions between 2006 and 2010.Xu Mei, the ministry's spokeswoman, said the number is even more than that of the graduates in the 20 years prior to 2006 combined."During the 11th five-year plan period (2006-2010), higher education has become even more accessible to the general public. Higher-learning institutions provide a strong support of brain power and human resources to the social and economic development," Xu said.The "Outline of China's National Plan for Medium and Long-Term Education Reform and Development (2010-2020)," which was publicized last year, says "the strategic goals to be attained by 2020 are to basically modernize education; shape a learning society; and turn China into a country rich in human resources."

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TAIPEI, Jan. 29 (Xinhua) -- Nora Sun, granddaughter of Sun Yat-sen, the forerunner of China's revolution to end feudalism, died Saturday afternoon in a Taipei hospital, about one month after being injured in a car accident.Sun, 72, was severely injured in a car crash while on her way to an airport near Taipei on Jan. 1. She was in stable condition after several operations, but her condition abruptly deteriorated Saturday afternoon, according to hospital officials, without giving additional details.Sun, who spent most of her time in Shanghai, came to Taipei to attend the Flora Expo. While returning to Taoyuan International Airport near Taipei the black sedan Sun was riding in crashed head-on into an oncoming vehicle, described as a red car. Sun had planned to return to Hong Kong that day.Sun's car had been driven by a friend. The driver of the red car, who was believed to be speeding, according to police, died on the spot. Sun, her friend, and an injured passenger in the red car were immediately transported to a hospital. .Sun is the youngest daughter of Sun Fo, son of Sun Yat-sen, the leader of the 1911 Revolution that ended imperial rule in China.

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FUZHOU, Feb. 5 (Xinhua) -- A minibus rolled over and fell into a reservoir in Shaowu City in southeast China's Fujian Province Friday afternoon, killing 10, local officials said early Saturday morning.Nine people were rescued, and two were still missing.The minibus bound for Shaowu from Yong'an lost control at 5:27 p.m. Friday when the driver apparently tried to avoid a motorbike. It fell into the Qianling Hydropower Station reservoir, according to officials with Nanping city government.About 200 police and rescuers were still looking for the missing people, and the investigation into the accident is underway.

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