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
People swim in the Adriatic Sea as a tradition to greet the New Year in Opatija, Croatia, on Jan. 1, 2019. (Xinhua/Goran Kovacic)
People swim in the Adriatic Sea as a tradition to greet the New Year in Opatija, Croatia, on Jan. 1, 2019. (Xinhua/Goran Kovacic)