“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	transition metal phosphides transition metal sulfide transition moment transition net transition nucleus transition of an automaton transition of free shear flows transition of spontaneous emission transition of structures transition of thermal convection transition operator transition operator semigroup transition orbit transition paradigm transition phenomenon transition point transition point of electricity transition point of magnetism transition probability transition probability and transition speed transition probability density transition probability distribution transition probability function transition probability matrix transition process

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