adj.负有义务的；凭依的
n.在职者；领圣职的俸禄的牧师
It is incumbent on me to reclaim him. 劝他改过是我义不容辞的义务。
I think it's incumbent upon us to support him. 我变为支持他是我们义不容辞的责任。
It is incumbent upon justice to give some warnings of their doubt about a case. 法官有责任提醒人们有关他们对案件的疑问。
incumbent用作形容词作“在职的”解时常用作定语；作“义不容辞的”解时常用作表语，其后常接“on〔upon〕 pron. +to- v ”结构。
