o.blig.a.to.ry
adj.(形容词)Morally or legally constraining; binding.强制性的,应尽的:法律上或道义上强制性的;有约束力的Imposing or recording an obligation:债务的:施加债务的,记录债务的:例句:a bill obligatory.债务的帐单
Of the nature of an obligation; compulsory:必须的;必修的:例句:Attendance is obligatory. Mathematics is an obligatory course.出席是必须的,数学是一门必修课
Biology Obligate.【生物学】 固性的,专性的
【引伸】
oblig.ato.rily
adv.(副词)