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"However, many challenges remain in converting these in principle methods into practice," said Berg. "The Newcomb Cleveland Prize winning paper presents a substantial step in addressing these challenges, demonstrating quantum communication over very long distances."
Reversing its previous position of shunning the man-made sector, De Beers took a U-turn in 2018 by selling man-made diamonds through its Lightbox Jewelry brand.
He also revealed that China will send a probe to Mars around 2020.
Cui made the remarks while addressing a public event held by a non-profit organization in the Midwestern U.S. state of Michigan.
Costantinos, also professor of public policy at the Addis Ababa University in Ethiopia, also echoed Wang's comments rejecting allegations that financial problems, including national debts, which African countries face, are the result of their cooperation with China.
来源：资阳报