“system of feudum”的概念、定义、翻译、参考文献-科学参考

单词	system of feudum
释义	system of feudum Encyclopedia 经济学封土制释 system of feudum封土制封君向封臣封赐土地，以换取封臣的军事和经济义务的经济形式。
随便看	urea urea acetaldehyde urea aldehyde slow release fertilizer urea-ammonium mixed nitrogen fertilizer urea ammonium nitrate solution urea cycle urea formaldehyde urea formaldehyde resin urea-formaldehyde resin urea-formaldehyde resins urea herbicide urea phosphate Ureaplasma urealyticum infection urea poisoning urea prilling tower urea resin urease urediniospore uredinium urediospore uredium uredosorus uredospore uredostage ureilite

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