“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	school counseling school credit bank school cultural identification system school culture school culture construction school curriculum management school democracy management school dictionary school district system School Education Law school education system school education system in China school effectiveness research school fee system School for Court Musicians school for mentally retarded children school for the blind school for the children with physical disabilities School Future Direction and Outline Law school general affairs management schoolgirls problem school health school health education and health promotion school health inspection school health standards

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。