eng: official
eng: official documents
eng: formal attitude
eng: official letter
eng: official curriculum
eng: official language
eng: picture, illustration, drawing, painting
eng: rival
eng: Digital Versatile Disk (DVD)
eng: rivalry
eng: promotion, simulation
eng: leadership style
eng: management, governance, leadership, guidance, charge
eng: editorial office, editorship
eng: editorial board, an editorial staff
