“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	grasstoots committee of Chinese Communist Youth League grass variety Grass Variety Approval Committee of China grass variety degradation grass variety selection grass variety stability grass variety uniformity grass weed grassy weed grate grate discharge ball mill grated－bottom intake grate-kiln pelletizing process graticle graticule Gratien Lazare Pognon grating grating array grating constant grating device grating diffraction measurement grating dividing head grating efficiency grating equation grating graphic processing

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。