“national certified reference material”的概念、定义、翻译、参考文献-科学参考

单词	national certified reference material
释义	national certified reference material Encyclopedia 工学〔化学计量基本概念〕释 national certified reference material国家标准物质经国家计量行政部门批准，用于统一量值的标准物质。
随便看	marine photic zone marine photosynthetic bacteria marine physical self-purification capacity marine physics marine phytoplankton marine pipelines marine plankton marine plant resources Marine Policy for America marine pollutant marine pollutant transfer marine pollution marine pollution eco-chemistry marine pollution ecology marine polychaete marine position fixing marine positioning equipment marine power plant marine power station marine primary productivity marine priority pollutants marine production space marine productivity marine propulsion reactor marine proteceted areas

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。