| 单词 | obligatory |
| 例句 | obligatory adjective •top hat and tails are obligatory for men:compulsory, mandatory, prescribed, required, demanded, statutory, enforced, binding, incumbent | requisite, necessary, imperative, unavoidable, inescapable, essential. ANT optional, voluntary. |
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英语同义词词典收录了14896条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。