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"But the top priority should still be stabilizing growth," Liu said.

"China International Import Expo will be one of the most important events in our cooperation with the Chinese business community in 2018. I am sure that this will be an event of global significance," said Gennady Chizhikov, the president of the Ukrainian Chamber of Commerce and Industry, according to Xinhua News Agency.

"But the world will not and cannot go back to the way things were," Tedros said."There must be a 'new normal'－a world that is healthier, safer and better prepared."

"Carl Wieman's appointment is not only because he is a physics Nobel laureate but also because he has carried out many innovations and brought many changes in education," said Chen Ningyu, general manager of Xueersi Online School.

"By hammering on each wooden railroad tie, workers can tell how much it has eroded and when to replace them with new ones," Dong said, adding a routine check of the ties is arranged once a month.