开篇kai pian

introductory song in tanci

• oregon trail
• orel(或oryol)
• orem
• ore mountains
• orenburg
• orense
• oreopithecus
• ore resources law
• oresebter
• oresme，nicole d’
• oresteia
• orestes
• orfe
• orfevrerie
• orff，carl
• orford
• organ
• organdie
• organette
• organic chemistry
• organic farming
• organistrum
• organization de l’armee secrete(oas)
• organization for economic cooperation and development(oecd)
• organization of african unity(oau)