“postage vouchers”的概念、定义、翻译、参考文献-科学参考

单词	postage vouchers
释义	postage vouchers Encyclopedia 工学邮资凭证释 postage vouchers邮资凭证由国家（地区）邮政部门发行的，作为邮件纳费标志的有价票证。包括邮票、印在邮资信封、邮资明信片、邮资邮简、邮资信卡上的邮资图案，邮资机打印的邮资符志，以及国际回信券。
随便看	direct economic burden direct economic loss from biological invasion direct economic loss of accident direct economic loss of transportation accident directed directed acyclic graph directed acyclic graph, DAG directed acyclic graphical model directed angle directed arc directed assembly directed beam directed-beam directed broadcast address directed circuit directed closed path directed complete graph directed complete partial order directed complete partial order, DCPO directed convex polyomino directed cycle directed design directed diffusion directed distance directed downward set

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