1. 强制性的;强迫的；义务的
If something is compulsory, you must do it or accept it, because it is the law or because someone in a position of authority says you must.
e.g. In East Germany learning Russian was compulsory...
在东德，俄语是必修课。
e.g. Many young men are trying to get away from compulsory military conscription.
很多年轻人试图逃避强制征兵的政策。