UN Secretary General Ban Ki-moon (C) learns to make "ceviche", a Peruvian emblematic typical food from Peruvian cook Virgilio Martinez (R), next to his wife Yoo Soon-taek, during the 20th Conference of the United Nations on Climate Change (COP20), in Lima, capital of Peru, Dec. 10, 2014. (Xinhua/Rong Hao)
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