| 单词 | first day cover | 
| 释义 | first day covernoun  : a philatelic cover franked with a newly issued postage stamp and bearing the postmark of the first day of issue and an officially chosen place of issue   | 
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英语词典包含469781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。