compulsory

adj.

必须做的，强制性的；义务的；必修的；

compulsory education义务教育

compulsory course必修课

compulsory insurance强制保险

compulsory license强制许可

nine-year compulsory education九年制义务教育

compulsory subject必修课

compulsory execution强制执行

compulsory measure强制手段

compulsory exercise规定动作

china compulsory certification中国强制认证（3C认证）

compulsory purchase强制购买

1. Attendance at evening prayers is not compulsory.
   参加晚祷并非硬性规定。
2. I think it is compulsory.
   我认为这是非做不可的。
3. The car insurance is compulsory.
   这项汽车保险是强制性的。
4. I think it is compulsory to look over the house.
   我认为检查这栋房子势在必行。
5. Building model stars is a compulsory task.
   建立恒星模型是一项势在必行的任务。
6. Is English a compulsory subject?
   英语是必修科目吗？
7. Is military service compulsory in your country?
   你们国家实行义务兵役制吗？

Compulsory Heterosexuality, Lesbian Existence
Compulsory Heterosexuality and Lesbian Existence
Compulsory averaging of crowded orientation signals in human vision.
The ethics and politics of compulsory HPV vaccination.
Compulsory admissions in a London borough: I. Social and clinical features and a follow-up.
How Large Are Human-Capital Externalities? Evidence from Compulsory Schooling Laws
How Large are the Social Returns to Education? Evidence from Compulsory Schooling Laws
[How Large Are Human-Capital Externalities? Evidence from Compulsory Schooling Laws]: Comment
Do dropouts drop out too soon? Wealth, health and happiness from compulsory schooling ☆
Effect of joint crisis plans on use of compulsory treatment in psychiatry: single blind randomised controlled trial.