详细解释:n. 邮戳
vt. 盖邮戳于
词型变化：
动词过去式:postmarked过去分词:postmarked现在分词:postmarking第三人称单数:postmarks英语解释：
名词 postmark:
a cancellation mark stamped on mail by postal officials; indicates the post office and date of mailing动词 postmark:
stamp with a postmark to indicate date and time of mailing同义词：frank