compulsory 

  1. 形容詞
必須做的, 義務的
必修的
強制的, 強迫的

    同義字詞
forced,imperative,incumbent,involuntary,mandatory,necessary,nonelective,obligatory,peremptory,required

例句

  1. It was compulsory for everyone.
  2. By law, primary education is compulsory .
  3. RoHa said voting is compulsory .. It is not.
  4. Zakat and Khums are compulsory deeds of worship.
  5. Project Work was also made compulsory from 2003.