obligatory

🇬🇧/əˈblɪɡətri/ 🇺🇸/əˈblɪɡətɔːri/📚 14409 1托福雅思
If something is obligatory, you must do it because of a rule or a law. 规定性的

adjective [原级]有义务的,强制性的;惯常的,赶时髦的;(规定,裁决)有约束力的

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。

单词造句:
网友用“Obligatory”造句精选
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。