He is also vice secretary-general of the UNESCO China-MAB( Man and the Biosphere) Committee and a member of the UNESCO MAB Urban Group.是什么意思_He is also vice secretary-general of the UNESCO China-MAB( Man and the Biosphere) Committee and a member of the UNESCO MAB Urban Group.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句