1. 形容詞
   義不容辭的, 義務的
   強制性的
   必須的, 必要的
   必修的
   

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

例句

1. When published it is to be obligatory .
2. Note that some group work is obligatory !
3. Gemination is obligatory in such contexts.
4. Such methods are obligatory for organic olives.
5. This type of fasting is considered obligatory .
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