Wang said the five years of chaos in West Asia and North Africa has affected not just countries and people in the region; it has also had serious spillover effects on international peace and stability.
The Chinese Young Pioneers, the country's largest children's organization for children aged 6 to 14 years, is run by the Communist Youth League, an organization of older youth that comes under the leadership of the Communist Party of China.股票600425千股千评Ye said the migrant workers have played a very important role - not only in the development of the places where they have worked, but also of their hometown, "since they bring back money".
BEIJING - The cylinder-shaped black object bears no resemblance to any ordinary clock, but it is one of the most advanced timepieces ever.
It was sent to space with the Space Laboratory of China's Tiangong-2 on Thursday, becoming the first ever cold atom clock working in space.
"This clock is so accurate that it should not lose one second in 30 to 300 million years in space," says Liu Liang, professor and director of the Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences.
Unlike ordinary clocks, the timekeeping device is based on atomic physics.
And unlike the most atomic clocks, this clock uses more advanced "cold atom" technology, ensuring its ultra precision.
A mechanical watch loses almost one second a day; a quartz watch loses about one second every 10 days; the hydrogen atomic clock loses about one second over millions of years; the cold atom clock exceeds all in accuracy, Liu says.
Scientists attribute its accuracy to the microgravity environment in space as well as the coldness of the atoms the clock uses.
Under microgravity conditions, the cold atoms, pushed by lasers, perform a uniform motion in a straight line. By observing their performance, scientists get more precise atomic clock signal than under the gravity conditions on Earth.
Moreover, the laser cooling technology helps to eliminate the influence of atomic thermal motion on the clock's performance.
"Though molecules and atoms can't be seen in a room, they are actually moving at high-speed, and the speed is equivalent to temperature," Liu explains.
"We use laser cooling technology to slow down the atoms to a temperature that a refrigerator could never reach, so they nearly stay still," Liu says. "By observing the almost static atoms we make our measurements more precise."
Scientists believe that putting such a clock in space will help set a time standard to synchronize other atomic clocks in space more precisely.
"A more accurate clock system in space will benefit us on Earth," Liu says, citing possible substantial improvements in navigation and positioning accuracy.
Scientists say the development of cold atom technology could also make many experiments possible, such as deep space navigation and positioning, dark matter probes, and even gravitational wave exploration.
"A lot of research is based on our measurement of time and space. If we could detect subtle changes in time and space, we could make discoveries beyond the range of existing technology," Liu says.
"In the future, there will be more accurate clocks than this cold atom clock and our ultimate goal is to make a clock that will never be a second fast or slow over the life of the universe."
Li Junru, former vice-president of the Party School of the Central Committee of the CPC, said that he was impressed by Xi's call to "stay true to the mission and keep moving forward".
Almost all pine trees on the island were wiped out by parasites present in furniture from the mainland, with the forest coverage rate plunging by more than 20 percent at the start of the 21st century. The government has since invested 10 million yuan (.5 million) annually to address the issue.The global financial market has experienced some volatility this year, experts say, because of investors' concerns about the increasing divergence of the monetary and fiscal policies of the world's major economies.
The region enhances the protection of female workers during menstruation, pregnancy, giving birth, lactation and menopause.Although Jing didn't specify which countries or regions are the top priorities in Ant Financial's globalization plan, he said developing countries, which are relatively weak in finance infrastructure, have more potential than developed regions.
第四，搏击、健美等特殊职业人群，这类人为了保持形体，可能一顿吃下20个鸡蛋，或2-3斤牛肉，又或3-4斤鸡肉；股票600425千股千评妻子约情人家中尝试“更刺激”偷情 起夜丈夫砍奸夫 正义网赣州12月1日电(通讯员 赖永柱)妻子与情人深夜家中偷情太猖狂,丈夫起夜发现“太受伤”,挥刀砍伤奸夫触刑律。随着日本社会老龄化的程度加重，“蛰居族”的年龄也在增加。
President Xi Jinping urged officials at all levels to increase their familiarity with the internet and improve their skills in using technology to better safeguard China's cyberspace sovereignty and security.The seminar activities will end on Sept 29.
The 430-meter long, 6-meter wide bridge, paved with 99 panes of three-layer transparent glasses, hangs between two steep cliffs 300 meters above the ground.
The paper highlights the word "don't push" and uses smaller font size for "when you don't feel the pain". [Photo/thepaper.cn]