| 单词 | letter obligatory |
| 释义 | > as lemmasletter obligatory letter obligatory n. a written contract or bond; also writing (bill, etc.) obligatory. Cf. extracted from obligatoryadj.< as lemmas |
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英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。