英语词汇first-day cover的意思、用法及释义-英汉双解词典

单词	first-day cover
释义	first-day cover envelope with a set of special stamps postmarked on the first day of issue 首日封.
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英汉双解词典包含38652条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。