英语词汇首日封是什么意思，首日封的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-电脑手机教程网

单词	首日封
释义	DEFINITIVE EXAMPLES 权威例句〔cachet〕A commemorative design stamped on an envelope to mark a postal or philatelic event.纪念邮戳，首日封：一信封上贴上一种有纪念意义的图案，以纪念集邮或邮政上的一个事件美国传统
随便看	alternating current motor alternating current power alternating current rectifier alternating current system alternating current traction alternating current transmission alternating current tube alternating current voltemeter alternating current welder alternating current/direct-current alternating differential form alternating discharge alternating displacement alternating dominance alternating dominance of the eyes alternating double bond alternating douche alternating e.m.f alternating electric current alternating electromotive force alternating expression alternating field alternating flashing light alternating flow hydraulic alternating flux

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