英 [əˈblɪɡətri] 美 [əˈblɪɡətɔːri]
adj. 有义务的，强制性的；惯常的，赶时髦的；（规定，裁决）有约束力的
obligatory /ɒˈblɪɡətərɪ/ TEM8
形容词 If something is obligatory, you must do it because of a rule or a law. 规定性的
Most women will be offered an ultrasound scan during pregnancy, although it's not obligatory.
大部分妇女怀孕期间都将进行超声波检查，尽管不是规定性的。
morally or legally constraining or binding
attendance is obligatory ; an obligatory contribution
required by obligation or compulsion or convention
he made all the obligatory apologies
有义务的
必选-引用次数：4
参考来源商务信函的语域分析
必读-引用次数：1
参考来源当代汉语儿化词的调查和研究
专性的
固性的
义务的
语文、数学、英语是 必修 ( Obligatory )的特别指挥科目，上月朔、初二时还要特殊接纳史册、地舆、生物(Biological)指挥，人因自觉而成长，因自满而堕落。
... obscure adj.不清楚的，隐晦的；vt.隐藏；使...模糊 obligatory adj.必须的；强制的； convictionn.看法，观念；信仰；定罪 ...
... obligated a.有义务的，有责任的 obligatory a.强制性的 obliging a.恳切的，热心助人的 ...
... obligatory 义务的；必须的；义不容辞的 obligate 有责任的，有义务的；必需的 obliging 乐于助人的；有礼貌的；体贴的；亲切的 ...
[法]义务的；必须的；义不容辞的
Priority must be given to the development of obligatory activities.
必须优先发展义务活动。
In the mid 60s he took the almost obligatory trip to India.
六十年代中期，他也赶时髦到印度一游。
It is obligatory for all employees to wear protective clothing.
所有员工必须穿防护服装。
In fact, a lot of ritual impurity is unavoidable and sometimes even obligatory, right?
事实上，很多仪式的不洁是无法避免的,有些时候甚至是必须的，不是么？
旧约导论课程节选 : 耶鲁公开课
Nor, however, was it met with the sort of scathing rebuke that was once obligatory.
Such treatment, even if she deserved it, is discretionary not obligatory, '' said the statement.
Near-crippling, too, are levels of debt servicing and obligatory pension payments to former public-sector officials.