“three-level preservation System”的概念、定义、翻译、参考文献-科学参考

单词	three-level preservation System
释义	three-level preservation System Encyclopedia 管理学三线典藏制释 three-level preservation System三线典藏制图书馆按照馆藏文献利用率高低及新旧程度，结合服务方式，将馆藏资源依次划分为三个层次，组成一、二、三线书库的藏书布局方法。
随便看	water resources optimal allocation water resources payment water resources planning water resources planning and design water resources protection water resources protection forest water resources scheduling water resources value accounting water resources zoning water resource tax water resource use water-retaining agent water retaining buildings in ancient China water retaining structure water retention of fiber water return gate water-rich silty sand stratum water right water right allocation Water right buy-back water right certificate water right system water right trading system water right transaction water right transaction between Dongyang and Yiwu

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。