i am studying for md degree with prof. li as my tutor(导师) right now.——略换角度,本意未变 i study as a md candidate guided/tutored(2选1) by prof. li. i am a md postgraduate directed by prof. li. 印象中,postgraduate似较candidate常见些,毕竟后者还可译为准(博士),即已考取博士、但还未入学者,可能引起歧义 ... 供参