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JERUSALEM, July 11 (Xinhua) -- An international research group has found that extreme cold snaps in the United States are driven by disruptions in a high-altitude Arctic air mass called the polar ...
LONDON, July 11 (Xinhua) -- The catastrophic flash floods that struck central Texas on July 4 have become one of the deadliest natural disasters in U.S. history, claiming more than 100 lives and ...
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