compulsory
/kəmˈpʌlsəri/
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adj. 強制的；必修的
- Swimming lessons are compulsory for all third graders in the city, so every child learns to stay safe in the water. 這座城市所有小學三年級學生都必須上游泳課，讓每個孩子學會在水中保護自己。
其他意思
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adj. 強制的, 義務的
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.
- In East Germany learning Russian was compulsory
也出現在：
字根
pel, pell, puls 驅使、推
com + puls + ory一起、完全 + 驅使 + 形容詞；地方