mandatory
adj. 强制性的，义务的；受（前国际联盟）委任统治的
n. 受托人，代理人（=mandatary）
复数 mandatories
例句
He was married, and that was mandatory.
他结婚了，这是强制性的。
I think that mandatory voting is a no-braine and dumb idea.
我认为强制投票这事是一个无脑的，极其愚蠢的想法。
An effective and mandatory program sponsored by the high school is the only solution to this serious problem.
由高中主办的的有效的强制性项目是解决这一严重问题的唯一办法。
